An AR15 brace, also known as a pistol stabilizing brace, is an accessory designed to improve control and stability when shooting AR-15 pistols. It attaches to the buffer tube at the rear of the lower receiver and provides additional support against the forearm or shoulder. The AR15 brace works with AR-15 pistol lower receivers, buffer tubes (typically pistol-style), buffer assemblies, and upper receivers. It’s ideal for enhancing accuracy and handling in compact AR-15 pistol builds for home defense, tactical use, or range shooting.