Cobalt Kinetics RCB-6 Features The Cobalt Kinetics RCB-6 muzzle brake is machined from stainless steel and finished in Black Nitride a coating chosen for its hardness and resistance to the heat and fouling generated at the muzzle. Built specifically around the 5.56x45mm NATO cartridge the brake is engineered both internally and externally so it integrates cleanly whether run bare or paired with a suppressor down the road. The 1/2x28 thread pattern matches the standard thread used on most 5.56 rifles so it drops onto an existing barrel without any special fitting. Its compact 2.15 inch length keeps the overall rifle length manageable for shooters who want brake performance without adding excessive bulk to the muzzle end. At just 2.6 ounces the RCB-6 adds negligible weight to the front of the rifle keeping handling characteristics close to stock while still cutting down on felt recoil and muzzle climb between shots. The deliberate internal engineering behind the brake is meant to work seamlessly with a suppressor host so shooters planning to add one later are not stuck with a mismatched muzzle device. This makes the RCB-6 a practical choice for competition shooters chasing faster follow-up shots as well as hunters and range shooters who want a more comfortable 5.56 rifle. For sale at GrabAGun it is a straightforward upgrade for any 5.56 rifle owner looking to tame recoil without overcomplicating their build. Cobalt Kinetics RCB-6 Specifications Manufacturer: Cobalt Kinetics Model: RCB-6 Type: Muzzle Brake Caliber: 5.56 / .223 Rem Compatible Hosts: Rifles Material: Stainless Steel Color: Black Length: 2.15 Thread Pattern: 1/2x28 Weight: 2.6 oz Available At: GrabAGun