Magpul STR Carbine Stock Mil-Spec for AR-15/M4
Mix and match across the range: 2 items save 5%, 3 save 10%, 4 or more save 15% on your whole basket.
Fits AR-15/M4 rifles with a Mil-Spec-diameter carbine receiver extension (buffer tube). Check your tube specification before ordering.
Not sure it fits your rifle? Ask us before you order
The Magpul STR is a mil-spec collapsible carbine stock with onboard battery storage for AR-15 and M4 rifles, fitting any Mil-Spec-diameter receiver extension.
CTR stability plus onboard storage — the STR is the carbine stock for shooters who want everything locked down.
The Magpul STR (Storage/Type Restricted, MAG470) starts with the CTR's celebrated friction-lock system — clamping the stock rigid against the receiver extension for zero wobble — then adds a wider cheek weld and two water-resistant battery storage tubes in the butt. Optic batteries, spare parts and small essentials ride in the rifle itself, protected from the weather and always where you left them.
The broader body also deepens the cheek weld surface, giving a fuller, more supportive reference for precision work behind magnified glass. A rubber buttpad, ambidextrous sling options and QD compatibility complete a stock that turns up on duty and competition rifles alike.
Fits AR-15/M4 rifles with a Mil-Spec-diameter carbine receiver extension (buffer tube), which covers most current builds. It will not fit commercial-diameter tubes, so confirm your buffer tube specification before ordering. Slide it on, set your length of pull, engage the friction lock — the wobble disappears instantly, with no permanent alteration to the rifle.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec carbine receiver extension |
| Finish | Black, Flat Dark Earth, Olive Drab Green, Stealth Gray |
| Adjustment | Dual friction lock |
| Brand | Magpul Industries |
| MPN | MAG470-BLK · MAG470-FDE · MAG470-ODG · MAG470-GRY |
Stability with storage to match. Order the STR Carbine Stock today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Rifle & Shotgun Stocks, Precision Rifle Stocks, AR-15 Parts or browse all Magpul.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec carbine receiver extension |
| Finish | Black, Flat Dark Earth, Olive Drab Green, Stealth Gray |
| Adjustment | Dual friction lock |
| Brand | Magpul Industries |
| MPN | MAG470-BLK · MAG470-FDE · MAG470-ODG · MAG470-GRY |
| Category | Rifle Stock |
| Barcode | 873750006239 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
It fits AR-15/M4 rifles with a Mil-Spec-diameter carbine receiver extension, which covers most current builds. It will not fit commercial-diameter tubes, so confirm your buffer tube specification before ordering. Fitting is the usual stock swap on the tube, with no permanent alteration.
The STR clamps against the buffer tube at two points once the length is set, which takes out the play a plain carbine stock has. The result is a firmer, quieter stock that holds its cheek weld under recoil. You release the lock to change length, then re-set it.
The STR has two water-resistant storage tubes in the body, sized for carrying spares in the stock rather than loose in a pocket. They're sealed against the weather, which matters if the rifle lives in a slip or gets used in the wet. The stock arrives with the tubes fitted and ready to use.
The <a href="/products/magpul-ctr-carbine-stock-mil-spec-mag310">CTR</a> is the lighter, simpler stock with a single friction lock and no storage, while the STR adds the second lock and the battery tubes for a little more weight. The CTR is offered in Black, Flat Dark Earth, Olive Drab Green and Modified Coyote Brown; the STR in Black, Flat Dark Earth, Olive Drab Green and Stealth Gray. If you're weighing up the family, our <a href="/blogs/buying-guides/choosing-an-ar-15-stock">stock buying guide</a> lays out the differences.
Orders are dispatched from the United Kingdom with £5 tracked UK delivery in 7–10 business days, and you'll get tracking by email when it ships. If a part turns out to be the wrong fit, see our returns policy or get in touch and we'll help sort it.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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