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.
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 service and competition rifles alike.
Key Features
- Dual friction-lock system: fixed-stock rigidity, zero rattle
- Two water-resistant storage tubes: batteries and spares onboard
- Wider, deeper cheek weld: superb behind optics
- Rubber buttpad & QD sling integration: fully equipped out of the box
- Four finishes: Black, Flat Dark Earth, Olive Drab Green, Stealth Gray
Compatibility & Fitment
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 you buy. Slide it on, set your length of pull, engage the friction lock — the wobble disappears instantly, with no permanent alteration to the rifle.
Technical Specifications
Platform | AR-15 / M4 |
Fits | Mil-Spec carbine receiver extension |
Finish | Black, Flat Dark Earth, Olive Drab Green, Stealth Gray |
Adjustment | Dual friction lock |
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Does the STR fit a standard carbine build?
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 you buy. Fitting is the usual stock swap on the tube, with no permanent alteration.
What does the dual friction lock give me?
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.
What's in the battery tubes?
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.
STR or CTR, and which color?
The CTR 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.
