The patent-pending Magpul ACS (Adaptable Carbine/Storage) – Commercial-Spec Model is a drop-in replacement butt-stock for AR15/M16 carbines using commercial-spec sized receiver extension tubes. A streamlined, anti-snag profile shields the release latch to prevent accidental activation and the extra-power lock mechanism uses a premium chrome-silicon spring to avert auto-collapse failure by resisting spring relaxation. Similar to the Magpul CTR™, the ACS also features a supplemental friction lock system that minimizes wobble* for enhanced weapon stability and accuracy. Dual, rear accessible, water-resistant battery storage tubes and an integral storage compartment in the butt of the stock provides multiple storage options. 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.


* Friction lock performance may vary depending on the receiver extension's dimensional tolerances.

Features

• 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)
• Supplemental friction lock minimizes accuracy robbing wobble*
• Premium chrome-silicon lock spring provides positive locking and long service life
• Sloping cheek weld provides a wide contact surface for user comfort
• Shielded release latch prevents snagging and accidental operation
• Replaceable 0.30" Rubber Butt-Pad offers an anti-slip surface and increases impact protection
• Compatible with Magpul ASAP® and other receiver-mount sling attachments
• Metal strike plate provides a hardened striking point on toe of stock
• 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
• Sling Mounts
  
  • Mid - Optional QD Sling Mount accommodates up to 1.5" push-button swivels (NOTE: QD Sling Mount Sockets are sold seperately.)
  • Rear/Bottom - 1.00" sling loop

Optional Accessories**

• Extended Rubber Butt-Pad, 0.55"
• Enhanced Rubber Butt-Pad, 0.70"
• Push-button QD Sling Mount Sockets

Specifications**

• ACS, Commercial-Spec Carbine Stock (w/ Rubber Butt-Pad, 0.30")
  
  • Weight, Stock: 0.89 lb.
  • Weight, w/ Rec. Extension: 1.29 lb.
  • Length, Stock: 7.95 in.
  • LOP Adjustment Range: 3.80 in.
  • LOP, M4 Collapsed: 11.75 in.
  • LOP, M4 Extended: 15.55 in.

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.