Drop-in replacement buttstock for AR-15/M4 carbines with dual battery storage tubes, integral storage compartment, and secure friction lock system for enhanced stability.
Fits: AR-15
The Magpul ACS (Adaptable Carbine/Storage) is a purpose-built replacement buttstock designed for AR-15 and M4 carbines equipped with mil-spec receiver extension tubes. This is a true drop-in component that requires no permanent modifications to your rifle.
Dual Battery Storage Tubes: Two rear-accessible, water-resistant compartments keep your batteries protected and ready. Whether you're running optics, lights, or other battery-dependent gear, the ACS keeps spares organized and within reach.
Integral Storage Compartment: The butt of the stock houses an additional storage area for small essentials—spare ammunition, cleaning patches, or other field necessities.
Anti-Snag Release Latch: Prevents accidental activation, ensuring your stock stays where you put it until you intentionally adjust it.
Supplemental Friction Lock: Minimizes excessive stock movement during firing, reducing play that can affect accuracy and weapon handling.
Secure Shoulder Purchase: The 0.30-inch thick rubber butt-pad grips your shoulder firmly, even when wearing body armor or tactical gear. No slippage, no compromise.
Manufactured in the USA to Magpul's exacting standards, the ACS combines practical storage with the rigorous performance demands of modern shooting sports and tactical training.
Compatibility: Mil-spec receiver extension tube required (not included).