Rearden SPB Features The Rearden SPB Facemount is engineered to fit Plan B type suppressor mounts giving shooters a reliable facemount interface that is compatible with Atlas and Atlas XL adapter systems. Proper installation calls for an alignment rod to ensure the entire system is set up correctly with the muzzle device torqued and rockset to the barrel for a secure repeatable fit. Rearden specifies torquing the device to approximately 15 to 25 ft lbs with the suppressor itself torqued to 10 ft lbs once mounted ensuring correct alignment every time. Machined from 17-4 PH steel the brake is built to handle the stress of repeated suppressor mounting and dismounting without degrading. A black nitride finish gives the SPB Facemount a 67 HRC surface hardness rating providing excellent wear resistance while helping create a tighter seal between the device and suppressor. Shims are included with this model to fine tune alignment during installation. At 1.73 inches in overall length and only 2.3 ounces the brake adds minimal length and weight to a .375 caliber rifle while still delivering the recoil management expected of a true muzzle brake. For shooters running a Plan B compatible suppressor system on a .375 caliber rifle the Rearden SPB Facemount is available for sale at GrabAGun. Rearden SPB Specifications Manufacturer: Rearden Model: SPB Caliber: .375 Caliber Color: Black Material: Steel Finish: Black Nitride Length: 1.73 Thread Pattern: 14x1 LH Weight: 2.3 oz Available At: GrabAGun