Description
The CTR has earned its reputation as one of the most trusted upgrades for the AR-15 platform, and this Mil-Spec version in Modified Coyote Brown gives you all the same functional improvements Magpul is known for, wrapped in a darker, richer take on the classic coyote tone. It's a drop-in replacement buttstock built for carbines running a mil-spec sized receiver extension tube, and it slides on without any gunsmithing or modifications to your rifle. The A-frame shape keeps things low profile, shielding the release latch so it doesn't snag on gear or get bumped accidentally while you're moving.
What Makes the CTR Mil-Spec Stock Sit So Solid
Most collapsible stocks have some play in them once they're locked at your preferred length of pull, but the CTR tackles that with a supplemental friction lock. Once you've dialed in your position across the six available settings, that secondary mechanism clamps down against the buffer tube and takes out the wobble and rattle you'd normally feel when shouldering or moving with the rifle. Depress the release lever and it lets go instantly when you need to readjust, so you're not fighting the stock every time you want to change your length of pull.
Comfort and Sling Options Built Into the CTR Design
The sloping cheek weld keeps the profile slim while still giving you a comfortable, consistent point of contact for sighting in. A removable rubber butt-pad, about a third of an inch thick, grips your shoulder through a jacket, plate carrier, or whatever else you've got layered on, so the stock doesn't slip when you need it to stay put. On the sling side, you get an integral ambidextrous QD socket plus two footman's loops, giving you several ways to run a sling depending on how you like to carry. There's even a lanyard hole at the toe of the stock for anyone who wants to rig up paracord.
Built from the same reinforced polymer Magpul uses across its PMAG and stock lineup, this CTR is made in the USA and holds up to the kind of use that would eventually wear down a lesser stock. Whether you're finishing out a build in a matching MCB color scheme or just want a stock that won't rattle apart after a few range trips, this is a proven piece of gear with a fresh look.
Key Specifications
- Manufacturer: Magpul Industries
- Model: CTR
- MPN: MAG310-MCB
- UPC: 840815150831
- Color: Modified Coyote Brown
- Product Type: Mil-Spec
- Style: Collapsible, 6-position
- Material: Reinforced polymer
- Fit: Mil-Spec sized carbine receiver extension tube (not included)
- Stock Weight: 0.55 lb (8.8 oz)
- Weight with Receiver Extension: 0.86 lb
- Stock Length: 6.90 in
- Length of Pull, Collapsed: 10.70 in
- Length of Pull, Extended: 13.95 in
- LOP Adjustment Range: 3.25 in
- Butt-Pad: 0.30 in thick rubber, removable
- Country of Origin: Made in USA
What’s Included
- Magpul CTR Mil-Spec Carbine Stock in Modified Coyote Brown
- Installed 0.30 in rubber butt-pad
- Integral ambidextrous QD sling socket and footman's loops (built into stock body)
Frequently Asked Questions
Will the Magpul CTR Mil-Spec stock fit any AR-15 buffer tube?
It's built specifically for mil-spec sized receiver extension tubes, so it will not fit a commercial-spec tube. If you're not sure which size your rifle has, check your existing tube or look up your lower receiver manufacturer's spec before ordering, since Magpul also sells a commercial-spec version of the CTR for that setup.
How is Modified Coyote Brown different from standard coyote or FDE?
Modified Coyote Brown, or MCB, is a newer color Magpul rolled out as a darker, richer variation of their existing coyote tones. It reads a bit deeper and more subdued than standard coyote brown or flat dark earth, giving you another option if you're trying to match a specific build's look.
Does the friction lock actually get rid of stock wobble?
It significantly reduces it. Once you set your length of pull and the friction mechanism clamps against the buffer tube, the stock feels locked in rather than loosely riding the tube, though how tight it feels can vary slightly depending on the exact tolerances of the buffer tube you're using.
What sling attachment options work with this stock?
The CTR has a built-in ambidextrous QD sling socket on both sides that accepts any standard push-button sling swivel, plus two footman's loops for traditional sling attachment. It's also compatible with Magpul's ASAP and ASAP QD sling mounts if you want to run something on the receiver instead.





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