REARDEN ATLAS GEN 2 ADAPTER The Atlas provides a mount interface for suppressors with inside diameter threading Bravo 1.375"-24. SPECS Weight: 2.15 OZ Length Added: 0.400a ^2 1-1/4a ^2 Wrench Flats Threads: 1.375a ^2-24 17-4 PH H900 Compatible with All Rearden Muzzle Devices Compatible with Q Cherry Bomb and Other Plan B Compatible Muzzle Devices Black Nitride Finish (67 HRC Surface Hardness) Mfg: Rearden Manufacturing Group Llc