Brownells AR-15 A-4 Stock Assembly Collapsible Commercial Black
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Collapsible buttstock similar to the current USGI M4 carbine stock
provides convenient six-position length-of-pull adjustment to fit
different-size shooters, including those wearing body armor. Ready to
install on any standard AR-15 rifle or carbine lower receiver; includes
1.17' diameter commercial buffer tube, receiver lock plate, lock nut,
toe-mounted steel sling loop, carbine recoil spring and buffer. Convert a
fixed-stock, flattop rifle to M4 carbine configuration without
permanent alterations to gun. Buttstock made from extremely tough,
fiberglass-reinforced, injection-molded nylon that resists impact, heat,
moisture, extreme cold, and most cleaning solvents. Stock interior
diameter is matched to buffer tube O.D. for a snug fit that eliminates
unwanted play and rattles that can give away your position. Steel lock
nut has four square notches and pre-cut detents for staking to lock
plate. Heavy duty, machined aluminum receiver extension, hardcoat
anodized for extra strength, stands up to the punishment of harsh
tactical operations. SPECS: Aluminum and fiberglass-reinforced,
injection-molded nylon, matte black. 8?” (22.2cm) OAL collapsed; 11?”
(29.9cm) OAL fully extended.