Constructed out of 6Al-4V Grade 5 Titanium and CNC welded the lithium was designed from the ground up to offer the best weight to suppression ratio of any 9mm SMG/PCC suppressor on the market. It uses internal features and venting to help reduce port pop on direct blowback operating systems and features industry standard 1.375x24 (also known as HUB/ASR Bravo) rear mounting threads to easily be adapted to the mounting system of your choice. The lithium 9 is compatible with 3 lug and booster/piston mounts and can be used on 9mm handguns.Features :,Length: 6" (no mount), Weight: 5.7 oz (no mount), OD: 1.5""Includes 1/228 Titanium direct thread mount (ZR0), Tube clamp & Socket tool6Al-4V Grade 5 Titanium and CNC welded