MAGPUL ACS Carbine Stock, Commercial-Spec, Black (MAG371-BLK)

Vendor: Magpul



The MAGPUL ACS Carbine Stock, Commercial-Spec, Black (MAG371-BLK) is a drop-in replacement buttstock for AR15/M16 carbines using commercial-spec sized receiver extension tubes. A streamlined, anti-snag profile shields the release latch to prevent accidental activation.

Similar to the Magpul CTR, the ACS also features a supplemental friction lock system that minimizes excessive stock movement 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.

  • Mounts on commercial-spec sized carbine receiver extension tube (not included) from manufacturers such as Bushmaster, DPMS, Olympic, and others
  • 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
  • Supplemental friction lock minimizes accuracy robbing wobble
  • Shielded release latch prevents snagging and accidental operation
  • Premium chrome-silicon lock spring provides positive locking and long service life
  • 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
  • Sling Mounts:
  • Mid - now includes the QD Swivel Sling Mount that fits up to 1.5" push-button swivels
  • Rear/Bottom - 1.00" sling loop
  • Made in U.S.A.
  • Black Finish
  • 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
  Length Maximum, in     7.95"  
  Width Maximum, in     2.58"  
  LOP Adjustment Range, in     3.80"  
  LOP, M4 Collapsed, in     11.75"  
  LOP, M4 Extended, in     15.55"  
  Weight, oz     14.08  
  Weight w/ Rec, oz     19.52  
  • MAGPUL ACS Carbine Stock, Commercial-Spec, Black (MAG371-BLK)