The Magpul ACS-L Carbine Stock (brand part number MAG378-ODG) is a drop-in replacement buttstock for AR-15/M4 carbines built around mil-spec-sized receiver extension tubes; the tube itself is sold separately. ACS-L stands for Adaptable Carbine Stock – Light, a streamlined version of Magpul’s ACS that keeps the same center storage compartment and improved cheek weld while removing the battery tubes for a slimmer, lighter package. It’s built for shooters who want ACS-level storage and comfort without the extra bulk or weight of the full-featured version. Finished in OD green, it’s a direct fit for any mil-spec carbine build.

Key Specifications

• Drop-in replacement buttstock for mil-spec receiver extension tubes.
• Streamlined version of Magpul’s ACS, designated ACS-L (Light).
• Retains the same center storage compartment as the full ACS.
• Retains the same improved cheek weld as the full ACS.
• Removes the battery tubes for a slimmer, lighter package.
• Finished in OD green.

Frequently Asked Questions

Does this include the receiver extension tube? No, it’s built for a mil-spec-sized tube, sold separately.

How is the ACS-L different from the standard ACS? It removes the battery tubes for a slimmer, lighter stock while keeping the same storage compartment and cheek weld.

Does it still have storage? Yes, it keeps the same center storage compartment as the full ACS.

Buy the Magpul ACS-L Carbine Stock, OD Green, Mil-Spec

Get ACS-level storage and comfort in a slimmer, lighter package. Order the Magpul Industries stock from our AR stocks and braces selection at our Lubbock, Texas gun shop.