Slim & Lightweight: Streamlined version of the ACS, designed for shooters who want less bulk without losing function.
Commercial-Spec Fit: Drop-in replacement for AR-15/M4 carbines using commercial-spec buffer tubes.
Cheek Weld: Broad, ergonomic cheek surface for comfortable, repeatable sight alignment.
Storage Compartment: Integrated center storage compartment for small items or maintenance tools.
Secure Adjustments: Shielded release latch protects against accidental activation.
Anti-Slip Butt-Pad: Angled rubber pad improves shoulder grip and reduces recoil impact.
Sling Mount Options: Includes QD swivel sling mounts and standard sling attachment points.
Durable Build: Reinforced polymer construction, made in the USA.
The Magpul ACS-L (Adaptable Carbine Stock – Light) is a drop-in replacement buttstock designed for AR-15/M4 carbines running commercial-spec buffer tubes. It takes the proven features of the full-sized ACS stock and trims the profile, making it lighter and more streamlined without sacrificing comfort or utility.
Shooters will appreciate the ample cheek weld surface, which promotes consistent head positioning and improved shooting stability. The ACS-L maintains the centerline storage compartment of the original ACS, while removing the side battery tubes for reduced weight and a slimmer overall shape — ideal for lightweight builds or tactical carbines.
The shielded release latch ensures accidental adjustments are minimized, while the anti-slip rubber butt-pad helps lock the rifle into your shoulder during rapid strings of fire. A variety of sling attachment points give you flexibility in carry methods, making this stock versatile for duty, competition, or personal builds.
Proudly built in the USA from reinforced polymer, the Magpul ACS-L Commercial-Spec stock delivers strength, comfort, and long-lasting adjustability for your AR platform.
| Feature | Details |
|---|---|
| Model | Magpul ACS-L (Adaptable Carbine Stock – Light) |
| Part Number | MAG370 |
| Platform | AR-15 / M4 carbines with Commercial-Spec receiver extensions |
| Weight | Approx. 12.0 oz |
| Overall Length | ~7.9 in |
| Length of Pull | 11.9 in (collapsed) – 15.2 in (extended) |
| Adjustment Range | ~3.3 in |
| Storage | Centerline storage compartment (no side battery tubes) |
| Sling Mounts | QD sling swivel mounts, multiple sling loops |
| Material | Reinforced polymer with rubber butt-pad |
| Origin | Made in USA |
Magpul Industries
Magpul Industries
Magpul Industries
Magpul Industries
Magpul Industries