Blank firing adaptor for a gun

Abstract

The application relates to a blank firing adaptor (100) for a firearm according to an embodiment, which comprises a body (102) for stopping a projectile and a booster (214) for restricting an outflow of propellant gas (R). The body and the booster (102, 214) comprise flow openings (110, 222) for the outflow of propellant gas. The booster is configured to be attached against the body so that a projectile channel (320) of the booster is aligned with a barrel of the firearm when the blank firing adaptor is attached to the firearm. The booster further comprises an attachment member (128) configured to attach the blank firing adaptor to an end of the barrel of the firearm so that the booster is positioned between the attachment member and the body when the blank firing adaptor is assembled.

Description

[0001] BLANK FIRING ADAPTOR FOR A GUN

[0002] Technical field

[0003] The application generally relates to a blank firing adaptor for a firearm.

[0004] Background

[0005] A blank firing adaptor is used in a self-loading firearm when the firearm is fired with training cartridges, e.g., blank rounds, to simulate the firing of live ammunition. The blank firing adaptor is used to prevent propellant gases from flowing out too quickly from the firearm, so that the pressure in the barrel of the firearm is sufficient to load a new round into the chamber of the self-loading firearm.

[0006] A blank firing adaptor is presented in US Patent 8,201 ,487, wherein a blank firing adaptor mimicking the shape and weight of a silencer can be attached by means of a locking mechanism to a flash suppressor screwed to the barrel of a selfloading firearm when the flash suppressor is inserted inside the blank firing adaptor through an attachment sleeve that interconnects the locking mechanism and the body.

[0007] The body has a chamber aligned with the barrel of the firearm, the flash suppressor and the attachment sleeve, to receive the end of the attached flash suppressor. The body also has a flow channel from the chamber to the outside of the blank firing adaptor to allow the outflow of propellant gas from the firearm and a solid metal body structure. A flow limiter is removably mounted in the flow channel to limit the rate of outflow of propellant gas, so that the pressure required for the self-loading function of the firearm is maintained in the barrel for a sufficiently long period of time.

[0008] If the firearm is mistakenly fired with a live round instead of a blank, the solid body structure will slow down the bullet striking the solid body structure via the chamber. If the body structure does not stop the live projectile, the live projectile, slowed down, can be directed out of the blank firing adaptor, downwardly from the firearm and its operator, by means of a redirection plate mounted on the body structure in order to prevent further damage other than destruction of the blank firing adaptor. Summary

[0009] One object of the invention is to solve problems of prior art and to provide a blank firing adaptor (adapter) attachable to a self-loading firearm to restrict an outflow of propellant gas from the self-loading firearm so that the pressure generated by the propellant gas during firing is sufficient to enable a loading function of the self-loading firearm, irrespective of its model, while the blank firing adaptor also allows a sufficient outflow of propellant gas to improve a shock absorption of the self-loading firearm.

[0010] Another object of the invention is to provide a blank firing adaptor that can be attached to the self-loading firearm and can be disassembled and reassembled and can be easily cleaned and which, if mistakenly fired with a live round, stops a projectile with its body so that only the body is damaged and rendered inoperative, which can be easily replaced by a new, functional body without changing the characteristics and operating principle of the blank firing adaptor.

[0011] One object of the invention is achieved by a blank firing adaptor and firearm according to the independent claims.

[0012] Some embodiments of the invention are described in the independent claims.

[0013] One blank firing adaptor for a firearm comprises a body for stopping a projectile and a booster for restricting an outflow of propellant gas. The body and the booster comprise a flow opening for the outflow of propellant gas. The booster is configured to be attached (secured) against the body so that a projectile channel of the booster is aligned with a barrel of the firearm when the blank firing adaptor is attached to the firearm. The booster further comprises an attachment member configured to attach the blank firing adaptor to an end of the barrel of the firearm so that the booster is positioned between the attachment member and the body when the blank firing adaptor is assembled.

[0014] One firearm comprises a blank firing adaptor, which comprises a body for stopping a projectile and a booster for restricting an outflow of propellant gas. The body and the booster comprise a flow opening for the outflow of propellant gas. The booster is configured to be attached against the body so that a projectile channel of the booster is aligned with a barrel of the firearm when the blank firing adaptor is attached to the firearm. The booster further comprises an attachment member configured to attach the blank firing adaptor to an end of the barrel of the firearm so that the booster is positioned between the attachment member and the body when the blank firing adaptor is assembled.

[0015] Brief description of the figures

[0016] In the detailed description of the figures, embodiments of the invention are described, by way of example, in more detail with reference to the following figures:

[0017] Fig. 1 shows an assembled blank firing adaptor according to a first embodiment in a perspective view

[0018] Fig. 2 shows parts of a disassembled blank firing adaptor according to a first embodiment in a perspective view

[0019] Fig. 3 shows an assembled blank firing adaptor according to a first embodiment in a cross-section A-A

[0020] Fig. 4 shows an assembled blank firing adaptor according to a second embodiment without an attachment member and outer casing in a perspective view

[0021] Fig. 5 shows a disassembled blank firing adaptor according to a second embodiment without an outer casing in a perspective view

[0022] Fig. 6 shows an assembled blank firing adaptor according to a second embodiment with an outer casing in a cross-section B-B

[0023] Detailed explanation of the figures

[0024] Figs. 1 -6 show a blank firing adaptor (adapter) 100 for a firearm attachable to the muzzle of a gas-operated self-loading, semi-automatic or fully automatic firearm. The semi-automatic firearm can be, for example, a semi-automatic rifle, submachine gun or pistol, and the fully automatic firearm can be, for example, an assault rifle, submachine gun or machine gun. The blank firing adaptor 100 is used in the firing of training cartridges, not "live" rounds, to mimic the effects of firing live ammunition (bullets).

[0025] The blank firing adaptor 100 has a one-piece cylindrical body (body structure) 102 for stopping a projectile. The body 102 comprises a cylindrical solid stopping portion 104 configured to stop a mistakenly fired live round, and a tubular (sheath-like) yielding portion 106 configured to transform the structure of the body 102 in its longitudinal direction D when the projectile stops at the stopping portion so that other structures of the blank firing adaptor 100 are not damaged. The body 102 is made of stainless steel, aluminium, titanium or a nickel- chromium based alloy, e.g., INCONEL® metal alloy, and has a thickness of the stopping portion 104 in the longitudinal direction D of e.g., 25-45 mm, e.g., 25, 30, 45, 40 or 45 mm.

[0026] The body 102 has a mounting hollow (mounting recess) 308 formed in its stopping portion 104, at the longitudinal central axis of the body 102, corresponding to the axes of the cross-sectional planes A-A and B-B, to allow propellant gas R discharged from the barrel when firing the firearm to flow out of the blank firing adaptor 100.

[0027] The body 102 further includes a flow opening 110 formed in its stopping portion 104 so that propellant gas R can flow out of the blank firing adaptor 100 and the amount of propellant gas R flowing out can be restricted (adjusted) to enable the loading function of the self-loading firearm. Threads (not shown) are formed on the inner surface of the flow opening 110.

[0028] The body 102 further includes at least one elongate cutout 112 to reduce its weight, e.g., one, two, three, four or more cutouts 112, formed in the yielding portion 106 of the body 102 to enable the yielding portion 106 to deform the body 102, i.e. change its own shape, along the longitudinal direction D in the event that a live round is mistakenly fired from the firearm and the projectile strikes the stopping portion 104.

[0029] The blank firing adaptor 100 further includes a tubular elongate booster (booster tube, gas tube) 214, open at both ends, to allow the outflow of propellant gas R from the blank firing adaptor 100. The booster 214 is made of stainless steel, aluminum, titanium or nickel-chromium based alloy, such as INCONEL® metal alloy.

[0030] The booster 214 further includes a mounting bevel 218 formed on the outer surface 216 of its end towards the barrel of the firearm to facilitate attachment of the booster 214 to the blank firing adaptor 100 and to enable the projectile channel 320 of the booster 214 to be aligned with the barrel of the firearm when the blank firing adaptor 100 is attached (secured) to the firearm.

[0031] The booster 214 further includes a flow opening 222 to allow propellant gas R to flow out of the blank firing adaptor 100 and to enable restriction of the amount of propellant gas R flowing out. Threads (not shown) are formed on the inner surface of the flow opening 222. The booster 214 is configured to abut (attach to) the mounting recess 308 of the stopping portion 104, which again is configured to receive the tubular booster 214 and to support the booster 214 by the inner surface of the mounting recess when the booster 214 is inserted into the mounting recess 308.

[0032] The blank firing adaptor 100 further includes a fastening mechanism 224 configured to lock the booster 214 to the body 102 through its stopping portion 104 and through the flow openings 110, 222 of the booster 214.

[0033] The fastening mechanism 224 is, for example, an adjustment screw configured to engage the threads of the flow openings 110, 222 of the stopping portion 104 and the booster 214 and to allow propellant gas R to flow out of the blank firing adaptor 100 via a propellant channel 326 travelling through it. The adjustment screw 224 is further configured to restrict the outflow of propellant gas R by means of the cross-sectional area of the screw channel 326 along the longitudinal direction of the adjustment screw 224, so that the pressure in the barrel of the firearm is sufficient to load a new cartridge into the chamber of the selfloading firearm.

[0034] The blank firing adaptor 100 further includes an attachment member 128, such as a flash suppressor (flash hider) for suppressing the flash discharged from the barrel of the firearm, or a muzzle brake for reducing the recoil of the firearm, configured to secure (attach) the blank firing adaptor 100 to the end of the barrel of the firearm such that the booster 214 is positioned between the attachment member 128 and the stopping portion 104 of the body 102 when the blank firing adaptor 100 is assembled. The attachment member 128 is made of stainless steel, aluminum, titanium or nickel-chromium based alloy, such as INCONEL® metal alloy.

[0035] The attachment member 128 comprises a projectile channel 130, intended to be aligned with the barrel of the firearm, the cross-sectional area of the projectile channel 130 being configured to increase away from the barrel of the firearm in the longitudinal direction D with the attachment member 128 attached to the barrel of the firearm and to mount the booster 214, by means of its mounting bevel 218, against the attachment member 128 so that the projectile channel 130 of the attachment member 128 and the projectile channel 320 of the booster 214 are aligned with the barrel of the firearm. The attachment member 128 further comprises threads 234 on its outer surface 232 for assembling the blank firing adaptor 100.

[0036] In a situation where a live round is mistakenly fired instead of a blank, the projectile strikes the stopping portion 104 such that the structure of the body 102 is deformed in the longitudinal direction D by means of at least one cutout 112 in the yielding portion 106. As a result of the impact, the distance between the stopping portion 104 and the attachment member 128 increases, and at the same time, the booster 214 attached to the stopping portion 104 becomes detached from the attachment member 120, allowing propellant gas R to discharge unrestrictedly out of the barrel of the firearm without causing structural damage to the barrel and loading mechanism of the firearm. In addition, the force of the impact of a live round can be absorbed through the deformation of the structure of the body 102.

[0037] A live round only destroys the body 102 of the blank firing adaptor 100 beyond repair, meaning that the damaged blank firing adaptor 100 can be repaired by disassembling the blank firing adaptor 100, replacing the broken body 102 with a new functioning body 102, and reassembling the blank firing adaptor 100 using the old and replaced parts that are intact and operable.

[0038] Figs. 1 to 3 show in more detail a blank firing adaptor 100 with a body 102 according to a first embodiment. The blank firing adaptor 100 comprises the above general features and can be used, as such, as a blank firing adaptor 100.

[0039] The body 102 is formed such that its end towards the barrel of the firearm is formed by a yielding portion 106, and the end away from the barrel of the firearm is formed by a stopping portion 104. A mounting recess 308 is formed at the barrel-facing end of the stopping portion 104, such that the mounting recess 308 further faces the interior 238 of the tubular yielding portion 106 and the attachment member 128 when the blank firing adaptor 100 is assembled.

[0040] The body 102 further includes threads (not shown) formed on the inner surface 336 of its yielding portion 106, which are configured to engage threads 234 on the outer surface 232 of the attachment member 128, such that the blank firing adaptor 100, when assembled, comprises the attachment member 128, the booster 214 attached to the stopping portion 104 of the body 102, and the body 102 attached to the attachment member 128 by the yielding portion 106 and completely enclosing the booster 214. The booster 214 is further configured to reach into the cylindrical interior 238 of the tubular yielding portion 106 defined by its inner surface 336, shown in more detail in connection with Fig. 6, and to attach to the cylindrical stopping portion 104 by means of a mounting recess 308 and an adjustment screw 224 screwed into the flow openings 110, 222 of the booster 214 and the stopping portion 104 when the blank firing adaptor 110 is assembled.

[0041] The at least one cutout 112 formed in the yielding portion 106 is configured to stretch the structure of the body 102, effectively the yielding portion 106, in the longitudinal direction D such that the distance of the stopping portion 104 from the barrel of the firearm increases in the longitudinal direction D if the firearm is mistakenly fired with a live round. The deformation of the body 102 prevents damage to other parts of the blank firing adaptor 100 in the event of such a mistake.

[0042] The blank firing adaptor 100 of the first embodiment is assembled by selecting an adjustment screw 224 enabling the loading function of the self-loading firearm. Next, the booster 214 is inserted into the interior 238 of the yielding portion 106 of the body 102 and the booster 214 is mounted in the mounting recess 308 of the stopping portion 104. The attachment of the booster 214 and the body 102 is completed by aligning the flow openings 110, 222 of the booster 214 and the stopping portion 104 and securing them together with the adjustment screw 224.

[0043] With the booster 214 and the body 102 secured (attached) together, the attachment member 128, whether attached to or detached from the firearm, is then inserted into the interior 238 of the yielding portion 106 of the body 102, whereby the projectile channel 130 of the attachment member 128, which opens up in a funnel-like fashion outwardly from the barrel of the firearm, i.e. , tapers in a fun- nel-like fashion towards the barrel of the firearm, guides the beveled 218 booster 214 so as to abut the attachment member 128. When securing the body 102 to the attachment member 128 by making the threads on the inner surface 336 of the yielding portion 106 of the body 102 to engage the threads 234 on the outer surface 232 of the attachment member 128, the projectile channel 130 tapering in a funnel-like fashion towards the barrel of the firearm, in cooperation with the bevel 218 of the booster 214, guides the booster 214 against the attachment member 128 so that the barrel of the firearm and the projectile channels 130, 320 of the attachment member 128 and the booster 214 become aligned as shown in Fig. 3.

[0044] If the attachment member 128 is already attached to the firearm, then the assembled blank firing adaptor 100 is ready for use after attachment of the attachment member 128 and the body 102. If, on the other hand, the attachment member 128 is still detached, the assembled blank firing adaptor 100 is ready to be attached to the firearm by means of the attachment member 128.

[0045] Figs. 4 to 6 show in more detail a blank firing adaptor 100 with a body 102 according to a second embodiment different from the first embodiment. The blank firing adaptor 100 comprises, in addition to the above general features, additional features presented in the figures and it can be used as a blank firing adaptor 100 by means of the additional features.

[0046] The blank firing adaptor 100 further includes a front end 440 configured to be attached to the outer surface 442 of the yielding portion 106 of the body 102 by means of threads 648 on the inner surface 546 of the collar 444 of the front end 440. The front end 440 further includes threads 452 on the outer surface 550 of the collar 444. The front end 440 is made of stainless steel, aluminum, titanium or nickel-chromium based alloy, such as INCONEL® metal alloy.

[0047] The blank firing adaptor 100 further includes a tubular outer casing (protective sleeve, protective shell) 656 configured to engage the threads 234, 452 of the outer surface 232 of the attachment member 128 and the outer surface 550 of the front end 444, similarly to the way the body 102 is secured (attached) to the attachment member 128 in the first embodiment of the blank firing adaptor 100 according to Figs. 1 to 3. The outer casing 656 is made of stainless steel, aluminum, titanium or nickel-chromium based alloy, such as INCONEL® metal alloy.

[0048] The outer casing 656 attached to the attachment member 128 and the front end 440 is further configured to protect (cover, enclose) the other structures of the blank firing adaptor 100, at least in part, such that it protects part of the structure of the attachment member 128, the booster 214, the body 102 with its adjustment screw 224, and part of the structure of the front end 440 when the blank firing adaptor 100 is assembled. The protection is provided by designing the outer casing 656 such that the cross-sectional area (diameter) of the interior 660 defined by its inner surface 658 in the longitudinal direction D is greater than the corresponding cross-sectional area of the body 102, and by ensuring that the distance between the outer surface 442 of the body 102 and the inner surface 658 of the outer casing 656 is sufficient to prevent the body 102 from damaging the outer casing 656 when it deforms due to a mistakenly fired live round.

[0049] The outer casing 656 has threads 662 on the inner surface of its end 658 towards the barrel of the firearm, configured to secure (attach) the outer casing 656 to the attachment member 128, and threads 664 on the inner surface of its end 658 away from the barrel of the firearm, configured to secure the outer casing 656 to the front end 440.

[0050] The body 102 is formed such that its end towards the barrel of the firearm consists of a stopping portion 104, and the end away from the barrel of the firearm consists of a yielding portion 106, in contrast to the first embodiment of the blank firing adaptor 100 according to Figs. 1 to 3. A mounting recess 308 is formed at the end of the stopping portion 104 towards the barrel of the firearm such that the mounting recess 308 is towards the attachment member 128 when the blank firing adaptor 100 is assembled.

[0051] The body 102 further includes threads 554 formed on the outer surface 442 of its yielding portion 106, which are configured to engage the threads 648 of the inner surface 546 of the collar 444 of the front end 440, such that the assembled front end 440 is secured (attached) to the body 102.

[0052] The booster 214 is further configured to reach into the cylindrical mounting recess 308 of the stopping portion 104 and to attach to the cylindrical stopping portion 104 by means of the mounting recess 308 and an adjustment screw 224 screwed into the flow openings 110, 222 of the booster 214 and the stopping portion 104, similarly to the first embodiment of the blank firing adaptor 100 according to Figs. 1 to 3. The booster 214 is further configured to attach to the stopping portion 104 such that the stopping portion 104 is between the booster 214 and the yielding portion 106 when the blank firing adaptor 100 is assembled.

[0053] The blank firing adaptor 100, when assembled, comprises the attachment member 128, the booster 214 attached to the stopping portion 104 of the body 102, the body 102 attached to the front end 440 by the yielding portion 106, as well as the outer casing 656 attached to the front end 440 and attachment member 128 that completely encloses the booster 214 and the body 102. The at least one cutout 112 formed in the yielding portion 106 is configured to compress the structure of the body 102, effectively the yielding portion 106, in the longitudinal direction D such that the distance of the stopping portion 104 from the barrel of the firearm increases and the distance from the front end 440 decreases in the longitudinal direction D if the firearm is mistakenly fired with a live round. The outer casing 656 and the cross-sectional area (diameter) of its interior 660 defined by the inner surface 658 is designed to allow the body 102 to deform within the outer casing 656, which has a larger cross-sectional area, whereby the deformation of the body 102 and the sufficient distance between the outer surface 540 of the body 102 and the inner surface 658 of the outer casing 656 prevent damage to other parts of the blank firing adaptor 100 in the event of a mistakenly fired live round.

[0054] The blank firing adaptor 100 of the second embodiment is assembled by selecting an adjustment screw 224 that enables the loading function of the self-loading firearm. Next, the booster 214 is inserted into the mounting recess 308 of the stopping portion 104 of the body 102 and the booster 214 is mounted on the mounting recess 308 of the stopping portion 104. The attachment of the booster 214 and the body 102 is completed by aligning the flow openings 110, 222 of the booster 214 and the stopping portion 104 and securing them together with the adjustment screw 224.

[0055] Once the booster 214 and the body 102 are secured together, the front end 440 is secured to the body 102 by screwing the front end 440 by means of the threads 648 on the inner surface 546 of its collar 444 to the threads 554 on the outer surface 442 of the yielding portion 106. Next, the outer casing 656 is attached to the front end 440 by screwing the outer casing 656 to the threads 452 on the outer surface 550 of the collar 444 of the front end 440 by means of threads 664 on the inner surface 658 of the end intended to be away from the barrel of the firearm.

[0056] With the booster 214, the body 102, the front end 440 and the outer casing 656 secured together, the attachment member 128, whether attached to or detached from the firearm, is then inserted inside the outer casing 656, into its interior 660, whereby the projectile channel 130 of the attachment member 128, which tapers in a funnel-like fashion towards the barrel of the firearm, guides the beveled 218 booster 214 to abut the attachment member 128. When attaching the outer casing 656 to the attachment member 128 by making the threads 662 on the inner surface 658 of its end towards the barrel of the firearm to engage the threads 234 on the outer surface 232 of the attachment member 128, the projectile channel 130 tapering in a funnel-like fashion towards the barrel of the firearm, in cooperation with the bevel 218 of the booster 214, guides the booster 214 against the attachment member 128 so that the barrel of the firearm and the projectile channels 130, 320 of the attachment member 128 and the booster 214 become aligned as shown in Fig. 6.

[0057] If the attachment member 128 is already attached to the firearm, then the assembled blank firing adaptor 100 is ready for use after attachment of the attach- ment member 128 and the outer casing 656. If, on the other hand, the attachment member 128 is still detached, the assembled blank firing adaptor 100 is ready to be attached to the firearm by means of the attachment member 128.

[0058] Only a few embodiments of the invention were described above by way of example. Naturally, the principle according to the invention can be modified within the scope of protection defined by the claims with regard to implementation details and fields of application.

Claims

Claims1 . A blank firing adaptor (100) for a firearm, comprising a body (102) for stopping a projectile and a booster (214) for restricting an outflow of propellant gas (R), which body and booster (102, 214) comprising a flow opening (110, 222) for the outflow of the propellant gas and which booster is configured to be attached against the body so that a projectile channel (320) of the booster is aligned with a barrel of the firearm when the blank firing adaptor is attached to the firearm, characterized in that the booster further comprises an attachment member (128) configured to attach the blank firing adaptor to a muzzle of the firearm so that, when the blank firing adaptor is assembled, the booster is positioned, in a longitudinal direction (D) of the blank firing adaptor, between the attachment member and the body, which is configured to deform in the longitudinal direction by means of its yielding portion (106).

2. A blank firing adaptor according to the previous claim, wherein the attachment member comprises a projectile channel (130), intended to be aligned with the barrel of the firearm, of which cross-sectional area is configured to increase away from the barrel of the firearm, when the attachment member is attached to the barrel of the firearm, and to mount the booster against the attachment member so that projectile channels (130, 320) of the attachment member and the booster are aligned with the barrel of the firearm.

3. A blank firing adaptor according to any one of the previous claims, wherein the attachment member is a flash suppressor (128) or a muzzle brake.

4. A blank firing adaptor according to any one of the previous claims, wherein the attachment member comprises threads (234) on an outer surface (232) of the attachment member for assembling the blank firing adaptor.

5. A blank firing adaptor according to any one of the previous claims, wherein the body comprises a mounting recess (308) configured to receive a tubular booster (214) and to support the booster by an inner surface of the mounting recess when the booster is inserted into the mounting recess.

6. A blank firing adaptor according to any one of the previous claims, which further comprises a fastening mechanism (224) configured to secure the booster to the body through flow openings (110, 222) of the body and the booster.

7. A blank firing adaptor according to claim 6, wherein the fastening mechanism comprises an adjustment screw (224) configured to engage threads of the flow openings of the body and the booster and to allow the propellant gas to flow therethrough out of the blank firing adaptor.

8. A blank firing adaptor according claim 7, wherein the adjustment screw is further configured to restrict the outflow of propellant gas by means of a cross- sectional area of a screw channel (326) along a longitudinal direction of the adjustment screw so that a pressure in the barrel of the firearm is sufficient to load a new cartridge into a chamber of the self-loading firearm.

9. A blank firing adaptor according to any one of the previous claims, wherein the body further comprises a stopping portion (104) configured to stop the projectile.

10. A blank firing adaptor according to claim 9, wherein the booster is configured to protrude inside (238) the tubular yielding portion (106) and to attach to the cylindrical stopping portion (104) when the blank firing adaptor is assembled.

11. A blank firing adaptor according to any one of claims 9-10, wherein an inner surface (336) of the tubular yielding portion comprises threads configured to engage threads (234) on an outer surface (232) of the attachment member so that the blank firing adaptor, when assembled, comprises the attachment member, the booster attached to the stopping portion of the body, and the body attached to the attachment member by the yielding portion.

12. A blank firing adaptor according to any one of claims 1 -9, wherein the booster is configured to attach to the cylindrical stopping portion (104) so that the stopping portion sits between the booster and the tubular yielding portion (106) when the blank firing adaptor is assembled.

13. A blank firing adaptor according to claim 12, which further comprises a front end (440) configured to engage threads (554) on an outer surface of the yielding portion and a tubular outer casing (656) configured to engage threads (234) on an outer surface (232) of the attachment member and the front end sothat the blank firing adaptor, when assembled, comprises the attachment member, the booster attached to the stopping portion of the body, the body, the front end attached to the yielding portion of the body, and the outer casing attached to the front end and the attachment member for protecting the booster, the body, and a part of the attachment member.

14. A blank firing adaptor according to any one of claims 9-13, wherein the tubular yielding portion comprises cutouts (112) formed in a structure of the body, which are configured to elongate the structure of the body in the longitudinal direction (D) when the booster is inside the yielding portion, or to compress the structure of the body in the longitudinal direction when the stopping portion is between the booster and the yielding portion.

15. A firearm comprising a blank firing adaptor (100) according to any one of the previous claims.

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