The Magpul STR (Storage/Type Restricted) is a drop-in replacement buttstock for AR15/M16 carbines using commercial-spec sized receiver extension tubes. 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.

NOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): mil-spec and commercial-spec. If you have a commerical-spec extension on your rifle, make sure to order the Mil-Spec STR.

STR, Mil-Spec (stock configuration)

Weight: 0.77 lb.

Weight, w/ Rec. Extension: 1.10 lb.

Length, Maximum: 7.30 in.

Width, Maximum: 2.58 in.

LOP Adjustment Range: 3.80 in.

LOP, M4 Collapsed: 11.10 in.

LOP, M4 Extended: 14.90 in.

Features