This item is discontinued by the manufacturer. Find the Mil-Spec version here!
Delivers Excellent Performance With More Functional Design
The Magpul ACS Carbine Storage Stock – Commercial-Spec is a top-notch drop-in replacement buttstock for AR15/M4 carbine rifles that utilize Commercial-Spec sized receiver extension tubes. Designed with dual, rear-accessible compartments, you can store extra batteries and other accessories that you may need during tactical operations.
Similar to the Magpul CTR, the Magpul ACS Carbine Storage Stock – Mil-Spec also features a streamlined anti-snag release latch to prevent accidental activation along with a supplemental friction lock system that minimizes excessive stock movement for enhanced weapon stability and accuracy.
Dual Rear-Accessible Storage For Accessories
The Magpul ACS Carbine Storage Stock – Commercial-Spec is an advance and more functional approach when it comes to upgrading your buttstock on your AR-15 Rifle. The dual, water-resistant battery storage tubes and an integral storage compartment in the butt of the stock can provide multiple storage options. The storage may also help to keep your rifle well-balanced for better handling.
This Buttstock also has a sloping cheek weld that allows for comfortable shooting while at the range. It also includes a 0.3-inch Rubber Buttpad that allows easier shoulder transitions for increased accuracy.
Features:
- Mounts on Commercial-Spec sized carbine receiver extension tube (not included) from manufacturers such as Bushmaster, DPMS, Olympic, and others (please see the note below)
- Sloping cheek weld provides a wide contact surface for user comfort
- 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 the 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 and other receiver-mount sling attachments
Sling Mounts:
- Mid – Now includes the QD Swivel Sling Mount that fits up to 1.5″ push-button swivels
- Rear/Bottom – 1.00″ sling loop
Optional Accessories:
- Extended Rubber Butt-Pad, 0.55″
- Enhanced Rubber Butt-Pad, 0.70″
Specifications**:
- Platform: AR10, AR15, M4, M16, M110, SR25
- Compatibility: Commercial-Spec sized carbine receiver extension tube (not included) from manufacturers such as Bushmaster, DPMS, Olympic, and others
- LOP – M4 Collapsed: ~11.6 in.
- LOP – M4 Extended: ~15.4 in.
- LOP – Adjustment Range: 3.8 in.
- Length: max 8.0 in.
- Weight: 14.1 oz.
- Weight – w/ receiver extension: 18.1 oz.
- Width: max 2.5 in.
NOTES:
- There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): mil-spec and commercial-spec. If you have a mil-spec extension on your rifle, make sure to order the Magpul ACS Carbine Storage Stock – Mil-Spec – MAG370.
- * Friction lock performance may vary depending on the host receiver extension’s dimensional tolerances.
- ** Specifications based on extended-length (slant-back) commercial-spec receiver extension and may vary depending on the tube manufacturer.
Specifications:
| Color | Black |




