Magpul BTR Arm Brace - Black Tactical Stabilizing Brace

The Magpul BTR arm brace is a stabilizing accessory engineered to transform the way you handle large-format pistols with a single hand. Designed for AR pistols equipped with Mil-Spec carbine receiver extensions, the BTR combines Magpul's proven design philosophy with practical features that make one-handed shooting more controllable and comfortable. Whether you're at the range, in training, or deploying your pistol in a defensive role, this black tactical brace offers a straightforward solution to improving stability and control without unnecessary complexity.

What sets the BTR apart is its thoughtful balance of function and simplicity. The brace uses high-strength polymer and metal construction to deliver durability without bulk, and the toolless length-of-pull adjustment lets you dial in your fit on the fly—no gunsmith visit required. The integrated QD cup is ambidextrous, so whether you're left or right-handed, you can mount a sling and apply tension while firing to anchor the gun against recoil and drift. An M-LOK compatible slot adds another sling attachment point if you want mounting flexibility.

This is purpose-built equipment for shooters who want genuine improvement in one-handed employment without gimmicks. Magpul engineered the BTR to work specifically with Mil-Spec carbine receiver extensions—check your upper and lower to confirm compatibility before ordering. As always, final firearm configuration is subject to federal, state, and local law; the user is responsible for understanding and following all applicable regulations.

Key Features

• Toolless, single-handed length-of-pull adjustment for quick fit changes
• Ambidextrous integrated QD cup for sling mounting
• M-LOK compatible slot provides additional sling attachment options
• Allows stabilizing sling tension application during one-handed firing
• High-strength polymer and metal construction for durability
• Compatible with Mil-Spec carbine receiver extensions only
• Designed and intended as a forearm stabilizing brace for one-handed pistol use

Specifications

Frequently Asked Questions

What AR pistols is the Magpul BTR compatible with?

The BTR is designed for AR pistols equipped with Mil-Spec carbine receiver extensions. It is not compatible with proprietary, pistol, or commercial receiver extensions. Verify your upper and lower receiver extension type before purchase.

Can I adjust the length of pull on the BTR without tools?

Yes. The BTR features a toolless, single-handed LOP adjustment mechanism, so you can dial in your fit quickly and easily without needing a screwdriver or gunsmith.

How does the sling mounting work on this stabilizing brace?

The BTR has an ambidextrous integrated QD cup and an M-LOK compatible slot, giving you two sling attachment points. You can apply stabilizing sling tension while firing one-handed to increase control and reduce drift.

What are the legal requirements for using the Magpul BTR?

The BTR is designed and intended exclusively as a forearm brace for one-handed firing and is not intended to be fired from the shoulder. Final firearm configuration and legality depend on federal, state, and local laws. The user is solely responsible for understanding and complying with all applicable regulations in their jurisdiction.