ATLAS BRAVO ADAPTER The Atlas Bravo provides a mount interface for suppressors with inside diameter threading 1.375-24. SPECIFICATIONS: Weight: 2.15 oz Length Added: 0.5a ^2 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