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Magpul STR Carbine Stock - Commercial Spec AR-15 - MAG471


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Shipping cost is $5.50 for orders under $35. We ship with UPS and USPS. 

Most orders ship out within 24 hours

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We have a 90-day no-hassle return policy. We pay return shipping.

If you need to request a return, contact us at and we will send you a return label

After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.

Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at We may direct you to pursue your warranty claim directly with the manufacturer.

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If you're dissatisfied with your purchase, in any way, please contact us at - we will do our best to make it right.

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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.

Made in U.S.A.


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® 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


STR, Commercial-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.

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

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