The Forward Controls Design 1215KM has been designed from the ground up to provide your favorite Dead Air KeyMo compatible suppressor with a life-extending sacrificial baffle while also functioning as an effective single-chamber muzzle brake when not being used as a suppressor host. The 1215KM features a .30 caliber bore helping to reduce noise and concussion with flat side ports that don't direct gas towards the shooter or bystandards behind the shooter. Machined from high-strength 4140 chrome molybdenum steel with a tough black-nitride finish, the 1215KM is a rock-solid choice for your next suppressor host.Features: 1/2x28 threaded for 5.56/.223 .30 cal bore to reduce blast 4140 steel Properly heat treated Salt bath nitride finish Effective recoil reduction Compatible with DeadAir KeyMo SuppressorsForward Controls Design firmly believes in the elegance of simplicity. Not content to produce purely aesthetic components, they put function before form to create parts and accessories that actually improve the handling and function of your firearms. When you need parts that just work without complication, you need Forward Controls Design.