The Magpul ACS (Adaptable Carbine/Storage) - Mil-Spec model is a high-quality AR15 / M4 carbine receiver extension tube. It is designed to be a drop-in replacement for those using MIL-SPEC sized receiver extension tubes on their firearms. This product boasts dual, rear-accessible, water-resistant battery storage tubes and an integral storage compartment located in the butt of the stock for multiple storage options.

One of the notable features of the Magpul ACS is its anti-snag release latch that helps to prevent accidental activation, along with a supplemental friction lock system. These features minimize excessive stock movement for enhanced weapon stability and accuracy. Additionally, this product comes equipped with a 0.30" thick rubber butt-pad that ensures positive shoulder purchase to prevent slippage, even when wearing body armor or modular gear.

Another benefit of this product is its sloping cheek weld design that provides a wide contact surface for added user comfort. The ACS also boasts shielded release latch that prevent snagging and accidental operation. The rubber butt-pad offers an anti-slip surface, which increases impact protection, and is equipped with platform AR10, AR15, M4, M16, M110, and SR25 compatibility.

The Magpul ACS is also compatible with Magpul ASAP, ASAP QD, and other receiver-mount sling attachments. The sling mounts include a mid-mounted, reversible sling mount kit (TYPE 3), which fits up to 1.5" push-button swivels (swivel not included) and a rear/bottom-mounted 1.00" sling loop.

One of the distinctive advantages of this product is it being made in the USA. It also comes with a premium chrome-silicon lock spring that provides positive locking and long service life. The MAGPUL ACS delivers superior quality and durability compared to other similar products in the market.

Note that there are two basic sizes of M4 Carbine receiver extensions (buffer tubes), and the Magpul ACS is compatible with MIL-SPEC sized carbine receiver extension tubes. If you have a commercial-spec extension on your rifle, be sure to order the commercial-spec ACS.

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