The FAB Defense FXGLSHOCK GL-Shock Buttstock for M16/M4 with Anti-Rattle Mechanism in Black Polymer delivers a dependable, low-profile solution for rifle platforms, combining durable polymer construction with a compact, ergonomic design that enhances control and comfort in dynamic shooting scenarios. Built for M4 and M16 rifles, this buttstock features an integrated anti-rattle mechanism that minimizes movement and noise while keeping the rear of the rifle stable during rapid cycling and prone transitions, helping shooters maintain a solid cheek weld and steadier aim. The polymer composition provides a lightweight yet rugged profile, resistant to impact and enduring field use, while the black finish offers a discreet appearance suited for a wide range of environments. With swivel studs incorporated, mounting accessories or slings remains straightforward, enabling quick adjustments to fit a shooters stance or gear setup without added complexity. Ideal for modern sporting and duty rifles, the GL-Shock buttstock reinforces shoulder contact, improves recoil management, and supports precision without sacrificing versatility. Designed to integrate seamlessly with M16/M4 platforms, it serves as a reliable upgrade for shooters seeking enhanced stability and comfortable, repeatable performance.