Rearden RPB Muzzle Brake Features The Rearden RPB Muzzle Brake is built around a .375 bore size and designed to work specifically with Plan B type suppressor mounts including the Atlas and Atlas XL systems. Its square shoulder design is a key detail since a properly squared muzzle device is essential for ensuring the suppressor mounts flush and aligned when installed over the brake later. A heat-treated steel construction gives the brake the strength to handle repeated recoil cycles and the heat generated by sustained firing strings without losing its shape or finish over time. Threaded at 5/8x24 the RPB is compatible with a wide range of barrels machined to that common thread pitch. At just 1.74 inches long and 1.71 oz the RPB adds minimal length or bulk to the muzzle end of a rifle while still delivering the recoil control shooters expect from a dedicated brake. The Gold finish over the heat-treated steel body gives it a distinctive look while retaining the same durability as the base material so it stands out without sacrificing function. Because it is purpose built for the Atlas Atlas XL and Plan B mounting ecosystem shooters already running one of those suppressor mounts can install it with confidence that the squared shoulder and bore size were engineered to match. For shooters who need a properly squared Plan B compatible brake that is both tough and finished to a higher standard the Rearden RPB is a dedicated solution built for that exact job. Rearden RPB Muzzle Brake Specifications Manufacturer: Rearden Model: RPB Type: Muzzle Brake Compatible Hosts: Atlas / Atlas XL / Plan B Color: Gold Material: Steel Finish: Heat Treated Thread Pattern: 5/8x24 Length: 1.74 Bore Size: .375 Weight: 1.71 oz Available At: GrabAGun