The Magpul CTR Carbine Stock Military Mod FDE is a mil-spec carbine stock designed for AR-15 and AR-10 pattern rifles with mil-spec receiver extensions. It features a friction lock system that eliminates rattle and enhances fitment on the buffer tube.
The CTR stock uses a lever-actuated friction lock to maintain a tight interface between the stock and receiver extension. This design reduces movement during use and provides a more stable cheek weld compared to standard carbine stocks.
The Military Mod configuration is suited for shooters who want adjustable length of pull with enhanced stability on mil-spec carbine buffer tubes.
Key Facts
Brand: Magpul
Model: CTR Carbine Stock Military Mod
SKU: MAG310-FDE
Finish: FDE (Flat Dark Earth)
How the CTR Stock Friction Lock System Works
The CTR uses a lever-operated locking mechanism that creates friction between the stock body and the buffer tube. When the lever is engaged, it expands a wedge inside the stock body to press against the tube surface.
This system eliminates the typical play found in standard carbine stocks. The result is reduced noise and improved stability, particularly useful when establishing a consistent cheek weld or mounting the rifle for precision shots.
Mil-Spec vs Commercial Buffer Tube Compatibility
The CTR Carbine Stock Military Mod is designed for mil-spec carbine receiver extensions, which have a smaller outside diameter than commercial buffer tubes. Mil-spec tubes measure approximately 1.14 inches in diameter, while commercial tubes are slightly larger at 1.17 inches.
Installing a mil-spec stock like the CTR on a commercial buffer tube will result in a loose fit and the friction lock will not function correctly. If you are unsure which buffer tube your rifle uses, send us a message and we can help you identify the right fit.
What the FDE Finish Means for Your Build
FDE stands for Flat Dark Earth, a tan or sand-colored finish common in tactical rifle builds. The CTR Carbine Stock Military Mod FDE uses this finish to match Magpul furniture and other components in FDE or similar earth tones.
Color matching across manufacturers can vary slightly. If you are building a complete rifle with color-coordinated components, consider viewing parts in person or ordering samples to verify the match.
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 Carbine Stock fit commercial buffer tubes?
A: No, the CTR Carbine Stock Military Mod is designed for mil-spec carbine receiver extensions only. Commercial buffer tubes have a larger diameter and will not fit properly. The friction lock system requires a mil-spec tube to function as intended.
Q: What does the friction lock lever do on the CTR stock?
A: The friction lock lever engages a wedge mechanism inside the stock that presses against the buffer tube to eliminate play and rattle. This creates a solid, stable connection between the stock and receiver extension, improving cheek weld consistency and reducing noise during movement.
Q: Can I use the Magpul CTR stock on an AR-10 rifle?
A: Yes, as long as the AR-10 uses a mil-spec carbine receiver extension. The CTR Carbine Stock is compatible with both AR-15 and AR-10 pattern rifles that have mil-spec carbine buffer tubes. Verify your buffer tube type before ordering.
Q: How do I adjust the length of pull on the CTR stock?
A: The CTR stock mounts on a carbine receiver extension, which has multiple locking positions. Press the adjustment lever on the stock to release it from the buffer tube, slide the stock to the desired position, then release the lever to lock it in place. The friction lock lever operates separately to tighten the fit at any position.
Q: Will the FDE finish on this stock match other Magpul FDE parts?
A: Magpul FDE parts are typically consistent within the same production batch, but color can vary slightly between batches and over time due to polymer properties. For the closest match, consider ordering all grips, pads, and stocks together. Send us a message if color matching is critical for your build.
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