Composite Bolt Carrier and Side-Charge Gas Reservoir for Recoil Simulation
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Solution Overview
Problem
Existing firearm simulators require complex modifications and do not allow for the use of standard components, such as magazines, which compromises the realism of the training experience.
Innovation Solution
A composite bolt carrier system is introduced that includes a softer material segment and a heavier segment, coupled with a pneumatic recoil assembly using a compressed gas reservoir, allowing for a seamless transition from a standard firearm to a simulator configuration while using regular magazines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a simulated bolt carrier group is used to convert a firearm to a simulator, then the weapon can be used for simulated firing practice, but the structure and components of the weapon must be modified which increases complexity and reduces adaptability
Solution Approach 1:
The simulated bolt carrier group is designed to function both as a genuine bolt carrier in live-fire mode and as a simulator actuator in training mode. The same component performs multiple functions: it serves as a structural element for mounting the charging handle and forward assist, while also housing the pneumatic actuator and laser trigger mechanism. This multi-functionality eliminates the need for separate simulator-specific components, thereby reducing overall system complexity while maintaining adaptability across different firearm platforms.
Solution Approach 2:
The patent combines the bolt carrier, charging handle, and forward assist into a single integrated simulated bolt carrier group. The charging handle and forward assist are mounted directly on the simulated bolt carrier rather than on separate structural components. This merging of functions and structures reduces the number of parts and simplifies the conversion process from a standard firearm to a simulator configuration, directly addressing the complexity reduction goal.
2Adaptability or versatility
If existing firearm simulator conversions are performed, then simulated firing is enabled, but standard components like magazines cannot be used which compromises training realism
Solution Approach 1:
The laser trigger mechanism is extracted from the traditional trigger group and integrated into the simulated bolt carrier group. This extraction allows the trigger group to remain in its original position and function, while the laser trigger on the simulated bolt carrier provides the simulated firing signal. This separation enables the use of standard magazines and trigger groups without modification, maintaining training realism while enabling simulator functionality.
3Reliability
If a simulated bolt carrier group is implemented, then recoil simulation is achieved, but the weight and material composition must be carefully balanced to maintain proper function
Solution Approach 1:
The simulated bolt carrier group utilizes composite construction with a polymer body and strategic metal reinforcements. The polymer material reduces overall weight compared to traditional all-metal bolt carriers, while embedded metal components provide necessary structural strength for mounting the charging handle, forward assist, and pneumatic actuator. This composite approach achieves the desired weight reduction while maintaining reliability of the simulated firing function.
Solution Approach 2:
The simulated bolt carrier employs local quality by using different materials in different regions: polymer for the main body to reduce weight, and metal reinforcements at critical stress points such as the charging handle mounting area and forward assist attachment points. This localized material differentiation ensures that weight is minimized where strength is less critical, while maintaining reliability where structural integrity is essential for proper function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces complexity and cost, maintains the use of standard components, and provides a realistic training experience by simulating recoil and magazine exchanges without altering the weapon's structure.
Implementation Method 1
a pneumatic recoil assembly using a compressed gas reservoir
Data Source
AI summary
A composite bolt carrier for a firearm simulator actuator which provides pneumatic recoil for a firearm simulator employing a metal receiver. The composite bolt carrier includes a first segment constructed of a material which is softer than the metal receiver and a second segment constructed of a material of greater mass than the material of the first segment. A simulated recoil assembly for a semi-automatic rifle having a receiver with an ejection port including an actuator adapted to reciprocate within the receiver upon metered delivery of compressed gas; and a compressed gas reservoir in fluid communication with the actuator through the ejector port.