Vulcan-2 Uragan 1/2 x 20 UNF Adaptor This adapter allows you to connect any standard 1/2 x 20 UNF moderator to your rifle shroud. This item comes with self-tightening tools (no other tools required). Fits 177, 22, 25 and 30 caliber. Threads size & pitch: 14 x 20G Outer diameter: 32mm Female
