6.8mm spc conversion kit for dod designation m249, mk46, mk48, mga saw, and fn minimi

Abstract

Implementations of the present invention relate to apparatuses, systems, and methods for converting an M249-platform firearm to allow the use of 6.8 mm SPC ammunition therein. The conversion kit comprises an adapted barrel, barrel extension, gas port, and bolt, which are each configured to allow rapid reconfiguration of the firearm between calibers.

Description

PRIORITY[0001]The present application claims priority to and the benefit of U.S. Provisional Patent Application No. 61 / 926,755 entitled “6.8 MM SPC CONVERSION KIT” filed Jan. 13, 2014, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND OF THE DISCLOSURE[0002]1. The Field of the Invention[0003]Generally, this disclosure relates to firearms. More specifically, the present disclosure relates to methods, devices, and systems for providing a DOD-designation M249-type platform firearm capable of firing 6.8 mm SPC I and II ammunition.[0004]2. Background and Relevant Art[0005]Belt-fed machine guns generally fall into two broad categories based on the way the gun fires ammunition: open-bolt or closed-bolt. In an open-bolt gun, the operating group, which includes the bolt, is held toward the rear of the receiver and away from chamber when not firing. The operating group is restrained, under tension from a spring, such that when the operating group is releas...

AI Technical Summary

Benefits of technology

The present disclosure provides apparatuses, systems, and methods for firing 6.8 mm SPC ammunition from an M249 platform firearm. The firearm includes a barrel, bolt, and gas port that work together to reliably align and securely retain standard 6.8 mm SPC rounds during firing. The invention also provides modifications to the bolt, barrel, and barrel extension to allow the M249 platform firearm to fire standard 6.8 mm SPC ammunition. Additionally, the patent describes techniques for replacing the bolt, carrier, slide, recoil spring, gas tube, trunnion, gas block, grip, trigger housing, and operating rod of a closed-bolt variant of the M249 platform firearm with different components to create a sear and trigger package containing a hammer or other impulse source. These modifications enable the M249 platform firearm to fire standard 6.8 mm SPC ammunition more effectively.

Problems solved by technology

However, the production of new open-bolt machine guns, such as the M249 platform, for civilian sale in the United States is now illegal.

However, an open-bolt belt-fed machine gun, such as the M249 platform has a number of disadvantages for use in military or law enforcement conflicts despite the high rate of fire of the weapon.

Typically, the high rate of fire of the M249 platform (approximately 800 rounds per minute) results in challenges for the operator to control the recoil and therefore accuracy of the weapon.

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