The Magpul STR Carbine Stock (brand part number MAG470-GRY) 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. STR stands for Storage/Type Restricted, and this stock is a storage-capable version of Magpul’s CTR, adding two water-resistant battery tubes to a compact, reinforced polymer A-frame design with an improved cheek weld. Two integral sling loops and a reversible push-button QD sling mount give a shooter multiple carry options, and a replaceable 0.30-inch rubber butt-pad delivers positive shoulder purchase that resists slipping even over body armor or modular gear. Made in the USA and finished in stealth gray, it’s a full-featured stock for any mil-spec build.

Key Specifications

• Drop-in replacement buttstock for mil-spec receiver extension tubes.
• Storage-capable version of Magpul’s CTR, designated STR.
• Includes two water-resistant battery tubes.
• Features an improved cheek weld.
• Includes two integral sling loops.
• Features a reversible push-button QD sling mount.
• Uses a replaceable 0.30-inch rubber butt-pad for positive shoulder purchase.
• Butt-pad resists slipping even with body armor or modular gear.
• Finished in stealth gray.

Frequently Asked Questions

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

Does it have a QD sling mount? Yes, a reversible push-button QD sling mount, plus two integral sling loops.

Will the butt-pad slip with body armor? No, the rubber butt-pad is designed to hold firm even with body armor or modular gear.

Buy the Magpul STR Carbine Stock, Stealth Gray, Mil-Spec

Get storage, sling options, and a no-slip butt-pad on your mil-spec build. Order the Magpul Industries stock from our AR stocks and braces selection at our Lubbock, Texas gun shop for fast, direct shipping.