In three colours for US$119.50 at Airsoft Extreme... "The patent-pending Magpul® ACS™ (Adaptable Carbine/Storage – Military Model) is a drop-in replacement butt-stock for carbines using mil-spec receiver extension tubes. A streamlined, anti-snag profile shields the release latch to prevent accidental activation and the extra-power lock mechanism uses a premium chrome-silicon spring to avert auto-collapse failure by resisting spring relaxation.

Similar to the CTR™, the ACS™ also features a supplemental friction lock system that eliminates wobble* 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 rubber butt-pad which gives positive shoulder purchase to prevent slippage even with body armor or modular gear.

• Professional Training System Version
• Mounts on Military Carbine Receiver Extension tube (Not included)
• Shielded release latch prevents snagging and accidental operation
• Premium chrome-silicon lock spring provides positive locking and long service life
• Supplemental friction lock eliminates accuracy robbing wobble*
• Sloping cheek weld provides a wide contact surface for user comfort
• Replaceable 0.30” Rubber Butt-Pad offers an anti-slip surface and increases impact protection
• Metal strike plate provides a hardened striking point on toe of stock
• 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
• Sling Mounts
• Mid - Optional QD sling mounts accommodate up to 1.5” push-button swivels
• Rear / Bottom - 1.00” sling loop"