FAB Defense GL-Shock M4/M16 Polymer Buttstock - Black

The FAB Defense GL-Shock is a black polymer buttstock for M4/M16-pattern rifles. It fits both mil-spec and commercial aftermarket receiver-extension tubes, providing an adjustable replacement stock option for compatible carbine platforms.

Its mil-spec reinforced polymer-composite body has a matte-black finish and incorporates a shock-absorbing, recoil-reducing system using an internal silicon-chrome alloy spring. A patented anti-rattle mechanism is paired with an inverted, quick-operating position-adjustment lever; the exterior is designed without protruding parts that could catch on gear or webbing.

The GL-Shock includes an integral ribbed non-slip rubber butt pad, quick-detach sling-swivel sockets on both sides, and swivel studs. Molded-in watertight storage accommodates either two CR123A 3-volt lithium batteries or AA 1.5-volt batteries; batteries are not included. Dimensions are 7.08 x 5.11 x 1.69 in, and the stock weighs 10.72 oz.