The Magpul STR(Storage/Type Restricted) is a drop-in replacement buttstock forAR15/M4 carbines using commercial-spec sized receiver extensiontubes. A storage-capable version of the CTR®, the STR has improvedcheek weld and two water resistant battery tubes on a compact,reinforced polymer A-frame design.A shielded operationlever and supplemental friction locking system prevent accidentaloperation and minimize excessive stock movement for enhanced weaponstability and accuracy.* The STR incorporates two integral slingloops, a reversible push-button QD sling mount, and a replaceable0.30″ rubber butt-pad which provides positive shoulder purchaseto prevent slippage even with body armor or modular gear.Madein U.S.A. FEATURES Mounts on commercial-spec sized carbine receiver extension tube (not included) from manufacturers such as Bushmaster, DPMS, Olympic, 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®, ASAP® QD, 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 NOTE:There are two basic sizes of M4 Carbine receiver extensions (buffertubes): mil-spec and commercial-spec. If you have a mil-specextension on your rifle, make sure to order the Mil-SpecSTR.SPECIFICATIONSSTRCarbine Stock, Commercial-Spec Weight: 12.3 oz. Weight, w/receiver extension: 16.3 oz. Length, max: 7.3 in. Width, max: 2.6 in. LOP Adjustment Range: 3.3 in. LOP, M4 Collapsed: ~10.9 in. LOP, M4 Extended: ~14.7 in. * Friction lockperformance may vary depending on the host receiver extension’sdimensional tolerances. ** Specifications based onextended-length (slant-back) commercial-spec carbine receiverextension and may vary depending on tube manufacturer.
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