The Novritsch SSG10 silencer adapter is a CNC machined adapter for attaching a silencer to Novritsch SSG10 models. The Novritsch SSG10 has its own threads, which means that the outer barrel of the gun requires its own adapter to attach the silencer. This adapter ONLY works with Novritsch SSG10 models. The adapter converts a 28CCW thread to a 14 CCW thread