The Magpul ACS (Adaptable Carbine/Storage) – Commercial-Spec Model is a drop-in replacement buttstock for AR15/M4 carbines using 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.
NOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): mil-spec and commercial-spec. If you have a mil-spec extension on your rifle, make sure to order the Mil-Spec ACS.
ACS Carbine Stock, Commercial-Spec
* Friction lock performance may vary depending on the host receiver extension's dimensional tolerances.
** Specifications based on extended-length (slant-back) commercial-spec receiver extension and may vary depending on tube manufacturer.