ACS-L™ Carbine Stock – Commercial-Spec

Product Code: MAG379-BLK

***Colours: Black, Flat Dark Earth, Grey, Olive Drab Green

Weight: 12.5 oz.  Weight, w/receiver extension: 16.5 oz.

Length, max: 8.0 in.  Width, max: 2.2 in.

LOP Adjustment Range: 3.8 in.  LOP, M4 Collapsed: ~11.6 in.  LOP, M4 Extended: ~15.4 in.


The Magpul ACS-L (Adaptable Carbine Stock - Light) is a drop-in replacement buttstock for AR15/M4 carbines using commercial-spec sized receiver extension tubes. A streamlined version of the ACS, the ACS-L utilizes the same centre storage compartment and cheek weld but removes the battery tubes for a slimmer, lighter weight package.



  • 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
  • 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®, ASAP® QD, and other receiver-mount sling attachments
  • Sling Mounts
    • Mid – Included reversible Sling Mount Kit – TYPE 3 fits up to 1.5" push-button swivels (swivel not included)
    • Rear/Bottom – 1.00" sling loop


NOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): mil-spec and commercial-spec.