- Includes stock body, extension tube, buffer, spring, castle nut, and receiver plate.
The Magpul STR (Storage/Type Restricted) is a drop-in replacement buttstock for AR15/M16 carbines using mil-spec sized receiver extension tubes. This is the full kit. It consists of the stock body, extension tube, buffer, spring, castle nut, and receiver plate. A storage-capable version of the CTR, the STR has improved cheek weld and two water resistant battery tubes on a compact, reinforced polymer A-frame design. A shielded operation lever and supplemental friction locking system prevent accidental operation and minimize excessive stock movement for enhanced weapon stability and accuracy.* The STR incorporates two integral sling loops, a reversible push-button QD sling mount, and a replaceable 0.30" rubber butt-pad which provides positive shoulder purchase to prevent slippage even with body armor or modular gear. Made in U.S.A. ITAR International Traffic in Arms Regulations Controlled Product