The Magpul STR (Storage/Type Restricted) is a drop-in replacement buttstock for AR15/M4 carbines using mil-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.
Made in U.S.A.
Features:
- Mounts on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others (please see the note below)
- Two water-resistant battery storage tubes located on the left and right sides of the stock
- Each tube will store up to two (2) CR123A lithium or AA batteries
- Tubes are accessible from the rear in any stock position via a hand-removable rubber plug
- Supplemental friction lock minimizes accuracy robbing wobble*
- Premium chrome-silicon lock spring provides positive locking and long service life
- Sloping cheek weld provides a wide contact surface for user comfort
- Shielded release latch prevents snagging and accidental operation
- Replaceable 0.30" Rubber Butt-Pad offers an anti-slip surface and increases impact protection
- Compatible with Magpul ASAP® and other receiver-mount sling attachments
- Sling Mounts
- Rear – Reversible Type 1 Sling Mount fits up to 1.5" push-button QD swivels (swivel not included)
- Rear/Bottom – 1.25" sling loops
Optional Accessories:
- Extended Rubber Butt-Pad, 0.55"
- Enhanced Rubber Butt-Pad, 0.70"
- Dual-side push-button QD swivel Type 2 Sling Mount
Specifications:
- STR, Mil-Spec (stock configuration)
- Weight: 0.77 lb.
- Weight, w/ Rec. Extension: 1.02 lb.
- Length, Maximum: 7.30 in.
- Width, Maximum: 2.58 in.
- LOP Adjustment Range: 3.25 in.
- LOP, M4 Collapsed: 11.10 in.
- LOP, M4 Extended: 14.35 in.
NOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): mil-spec and commercial-spec. If you have a commercial-spec extension on your rifle, make sure to order the Commercial-Spec STR. Please see the "Related Info" section above to determine which tube you have.
* Friction lock performance may vary depending on the host receiver extension's dimensional tolerances.
** Specifications based on standard-length (flat-back) M4 Carbine receiver extension and may vary depending on tube manufacturer.
Standard Rubber Butt-Pad, 0.30" weight: 0.08 lb. Optional Extended Rubber Butt-Pad, 0.55" (weight: 0.11 lb.) or Enhanced Butt-Pad, 0.70" (weight: 0.13 lb.) may be used with either Mil-Spec or Commercial-Spec STR stocks.
