Rearden MFG Single Port Brake (SPB), 1/2×28, .280

Description The Rearden SPB muzzle brake fits the plan B type mounts. This is an updated version that has larger wrench flats on the rear. Always use an alignment rod to ensure that the entire system is set up correctly. Make sure all surfaces are cleaned and the muzzle device has been torqued and Rockset to the barrel. Be aware, use on a Q can voids your warranty. TECHNICAL SPECIFICATIONS: 17-4 PH H900 Atlas and Atlas XL Compatible Plan B Compatible Atlas Adapter Overrun Approximately 1.050″ Atlas XL Adapter No Overrun Black Nitride Finish (67 HRC Surface Hardness)