Dead Air DA163 KeyMo Muzzle Brake 45 Cal 11/16x24 Black Nitride

The Dead Air DA163 KeyMo Muzzle Brake is a large-bore quick-detach muzzle device engineered for hard-recoiling cartridges in the 45 Cal class, up to .458. As the foundation of Dead Air's KeyMo (Key Mount) system, this brake tames punishing recoil on magnum-class rifles while providing a fast, repeatable attachment point for any KeyMo-compatible suppressor.

Precision-machined from 4140 HT alloy steel and finished in durable Black Nitride, the DA163 is built to withstand the harsh pressure cycles of large-bore cartridges without compromise. A precision-cut 11/16x24 thread pattern makes this brake a natural fit for any 45 Cal-class build needing serious recoil control, including .458 SOCOM-chambered platforms. At roughly 3.2 oz and 2.58" overall, it adds minimal weight and length while delivering heavy recoil mitigation.

Once timed, the DA163 accepts Dead Air's KeyMo suppressor adapters and mounts, allowing the host suppressor to lock on with a simple, repeatable motion and stay concentric shot after shot. For shooters running KeyMo-threaded suppressors on big-bore rifles, the DA163 is the rock-solid starting point that ties the system together.