Rearden MFG 10126 R2S, M18x1.5 Threads, .40 Bore, Rainbow Finish, 25 Degree Taper

Thread Pitch - M18x1.5Weight - 1.96 ozLength - 2.25"Length Added - 1.305"17-4 PH H900Atlas and Atlas XL CompatiblePlan B CompatiblePVD FinishShims not includedTapered for barrelDesigned for 8.6 BlackoutThese fit the plan B type mounts. 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. Use on a Q can voids your warranty, be warned.Torque the muzzle device to appro