The Magpul CTR Carb Stock Military Mod in OD Green is a drop-in replacement buttstock designed for AR-15 and AR-10 carbines with mil-spec diameter buffer tubes.
This stock addresses the common problem of wobble between the stock and buffer tube. A friction lock mechanism tightens the fit, eliminating rattle and providing a more rigid cheek weld. That makes it a practical upgrade for anyone who wants repeatable eye relief and a solid mount point.
The CTR maintains the length-of-pull adjustability of a standard carbine stock while adding a locking feature that holds your selected position under recoil and handling. It’s well-suited to duty rifles, competition setups, and general-purpose builds where consistency matters.
Key Facts
Brand: Magpul
Model: CTR Carb Stock Military Mod
Finish: OD Green
SKU: Mag310-ODG
How the CTR Stock Differs from Standard MOE Stocks
The CTR and MOE stocks share a similar profile, but the CTR adds a friction lock lever. Standard carbine stocks slide along the buffer tube without additional retention, which can create play over time or with certain tube tolerances. The CTR’s lock clamps down on the tube, eliminating that movement.
If you already run a Magpul MOE stock and want less slop, the CTR is the direct step up. Both fit mil-spec buffer tubes, and both offer the same positions. The CTR simply locks in place once you set it.
Compatibility and Installation
This stock is designed for mil-spec carbine buffer tubes. Mil-spec tubes measure approximately 1.14 inches in outer diameter, which is the standard on most AR-15 and AR-10 carbines. Commercial-spec tubes are slightly larger and will not fit this stock.
Installation requires removing your current stock, sliding the CTR onto the buffer tube, and locking it at your preferred length. No permanent modification is needed. If you’re upgrading other lower parts, the CTR pairs well with aftermarket grips and trigger guards.
What to Confirm Before You Order
Verify that your carbine uses a mil-spec buffer tube. If you’re unsure of your tube diameter or have a commercial-spec lower, send us a message to confirm compatibility before ordering.
The OD Green finish on this stock may not perfectly match other OD Green parts from different manufacturers or production runs. Anodizing and polymer colors can vary. If color matching across your build is critical, ask about finish consistency when you call.
Ordering from Western Sport
Order online and it ships straight to your door. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.
Frequently Asked Questions
Q: Does the Magpul CTR stock fit commercial buffer tubes?
A: No, the CTR is designed exclusively for mil-spec carbine buffer tubes. Commercial-spec tubes have a larger outer diameter and will not fit this stock. Measure your buffer tube or send us a message to confirm compatibility.
Q: What is the difference between the CTR stock and a standard carbine stock?
A: The CTR adds a friction lock lever that clamps onto the buffer tube, eliminating wobble and keeping the stock firmly in your selected position. Standard carbine stocks do not have this lock and can develop play over time.
Q: Will the OD Green finish on this CTR stock match other Magpul OD Green parts?
A: Color matching between different production runs and part types is not guaranteed. Anodized metal and polymer can show variation. If exact color coordination is important to your build, send us a message to discuss options.
Q: Can I install the Magpul CTR stock myself?
A: Yes, installation is straightforward. Remove your existing stock, slide the CTR onto the mil-spec buffer tube, and lock it at the desired length. No gunsmithing or permanent modification is required.
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