Magpul – BTR Arm Brace for AR Pistols, Mil-Spec

The Magpul BTR Arm Brace is a purpose-built stabilizing brace designed to improve the single-handed control of large-format AR pistols. Engineered with Magpul’s proven design philosophy, the BTR offers a rugged, minimalist solution for shooters seeking enhanced stability without unnecessary complexity.

Compatible with Mil-Spec carbine receiver extensions, the BTR features a streamlined, tool-less adjustment mechanism that allows for quick, single-handed length adjustments in dynamic or emergency situations. Its lightweight yet durable polymer and metal construction ensures long-term reliability in hard-use environments.

An ambidextrous rear QD sling cup and M-LOK compatible slot allow the use of a stabilizing sling to apply tension against the forearm, significantly improving control during one-handed firing. With classic Magpul aesthetics and American-made quality, the BTR is a practical upgrade for AR pistol platforms used in preparedness, duty, or defensive roles.

• Designed to improve single-handed use of large-format AR pistols
• Compatible with Mil-Spec carbine receiver extensions only
• Tool-less, single-handed adjustment mechanism
• Ambidextrous rear QD sling cup for stabilizing sling tension
• M-LOK compatible slot for additional sling mounting options
• High-strength polymer and metal construction
• Classic Magpul design and ergonomics
• Made in the USA

Platform: AR15 / M4
Compatibility: Mil-Spec sized carbine receiver extension equipped AR pistols only. Not compatible with proprietary, pistol, or commercial-spec receiver extensions.

Legal Disclaimer: This product is designed and intended to be used as a forearm stabilizing brace for one-handed firing of a pistol. It is not intended to be fired from the shoulder. Any modification or reconfiguration may render the firearm subject to NFA regulation. The end user is solely responsible for ensuring compliance with all federal, state, and local laws.