PRODUCT DETAILS as per Manufacturer’s site:
The Magpul ACS-L (Adaptable Carbine Stock – Light) is a drop-in replacement buttstock for AR15/M4 carbines using mil-spec sized receiver extension tubes. A streamlined version of the ACS, the ACS-L utilizes the same center storage compartment and cheek weld but removes the battery tubes for a slimmer, lighter weight package.
Made in U.S.A.
-Mounts on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others.
-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
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