ACS™ M4 Carbine Collapsible Butt-Stock – Military Model
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.
Note: There are two basic types of M4 Carbine Receiver Extensions (buffer tubes): Mil-Spec and Commercial. If you have a Commercial extension on your rifle, make sure to order the soon-to-be released Commercial ACS™ (MAG371).
Features
Ø Mounts on Military Carbine Receiver Extension tube (Not included)
Ø Shielded release latch prevents snagging and accidental operation
Ø Premium chrome-silicon lock spring provides positive locking and long service life
Ø Supplemental friction lock eliminates accuracy robbing wobble*
Ø Sloping cheek weld provides a wide contact surface for user comfort
Ø Replaceable 0.30” Rubber Butt-Pad offers an anti-slip surface and increases impact protection
Ø Metal strike plate provides a hardened striking point on toe of stock
Ø Two water-resistant battery storage tubes located on the left and right sides of the stock
o Each tube will store up to three CR123 lithium or two AA batteries
o Tubes are accessible from the rear via a tethered, hand-removable rubber plug
Ø Storage compartment in tail of stock with positive latching access door on right hand side
Ø Sling Mounts
o Mid - Optional QD sling mounts accommodate up to 1.5” push-button swivels
o Rear / Bottom - 1.00” sling loop
Specifications**
Ø ACS™ Military Carbine Stock (w/ Rubber Butt-Pad, 0.30”)
o Weight, Stock: 0.86 lb.
o Weight, w/ Receiver Extension: 1.16 lb.
o Length, Stock: 7.93 in.
o LOP Adjustment Range: 3.3 in.
o LOP, M4 Collapsed: 11.45 in.
o LOP, M4 Extended: 14.75 in.
* Friction lock performance may vary depending on the receiver extension’s dimensional tolerances.
