Magpul ACS-L Carbine Stock Stealth Grey Synthetic for AR-15, M16, M4 with Mil-Spec Tube (Tube Not Included) offers a slimmer, lighter alternative to the ACS Carbine Stock with a built-in storage bay. Fits Mil-Spec receiver extensions. Removes battery storage tubes to cut weight while retaining an enhanced sloped cheek weld. Rear storage bay accessible via right-side latching door. Ambidextrous release latch and supplemental friction lock system provide quick, secure adjustments shielded from accidental activation. Anti-slip rubber butt pad absorbs recoil. Reversible QD sling cup and footman's loop included; compatible with ASAP/ASAP QD mounts. OAL: 8. Weighs 12.50 oz. Made in the U.S.A. Safety note Follow all manufacturer installation instructions. Verify proper fit and secure mounting before use. Comply with local firearm laws and regulations.