The U.S. Army Armament Research, Development and Engineering Center (ARDEC) has developed, patented, and fielded a buttstock assembly that is adjustable to accommodate a variety of pull lengths. Adjustments can be made using only one hand. Accidental adjustments are eliminated by requiring the user to depress a single button and rotate the assembly one-quarter turn to enable the pull length to be adjusted. A quick twist back locks the buttstock in position.
The ability to quickly adjust pull length is important to accommodating various sizes of firearm users, different shooting styles and usage situations, or even adjusting to seasonable or mission-specific outerwear such as jackets and body armor. The adjustable feature of some competing technologies can be accidentally activated, while other designs are not easy to use.
The ARDEC device overcomes both shortcomings in a unit that is highly durable. It is currently deployed for use on M240 and M249 machine guns. ARDEC’s adjustable buttstock also features a removable, modular cheek rest that provides convenient storage for important small items and supplies. The buttstock can be utilized with or without a buffer device and can be modified to accommodate a variety of firearms.
- Simple: One button press and a quarter turn rotation of the stock are the only movements required to adjust the pull length of the buttstock
- Reliable: The single button and twist combination ensure the device length changes only when desired by the user
- Military Grade: The durable ARDEC design is standard issue for new US Army M240 and M249 variants and is being retrofit on existing weapons
- Detailed technical design package
- US Patent 8,186,090
- Potential for collaboration with ARDEC research team