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The Magpul ACS (Adaptable Carbine/Storage) - is a drop-in replacement buttstock for AR15/M4 carbines using mil-spec or commercial-spec sized receiver extension tubes. Dual, rear accessible, water-resistant battery storage tubes and an integral storage compartment in the butt of the stock provides multiple storage options.
Similar to the Magpul CTR, the ACS also features an anti-snag release latch to prevent accidental activation along with a supplemental friction lock system that minimizes excessive stock movement for enhanced weapon stability and accuracy*. The ACS comes standard with a 0.30" thick rubber butt-pad which provides positive shoulder purchase to prevent slippage even with body armor or modular gear.
Made in U.S.A.
Mil-Spec stock mounts on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others (please see the note below)
Commercial-spec mounts on commercial-spec sized carbine receiver extension tube (not included) from manufacturers such as Bushmaster, DPMS, Olympic, and others (please see the note below)
Sloping cheek weld provides a wide contact surface for user comfort
Two water-resistant battery storage tubes located on the left and right sides of the stock
Each tube will store up to three CR123 lithium or two AA batteries
Tubes are accessible from the rear via a tethered, hand-removable rubber plug
Storage compartment in tail of stock with positive latching access door on right hand side