SureFire HUB FA 5.56 Suppressor Muzzle Adapter, 1.375x24, Nitride Black - HUB-FA-556-BK

This is a suppressor muzzle adapter that converts HUB-pattern suppressors for use with SureFire SOCOM Fast-Attach muzzle devices in 5.56 NATO. Constructed from heat-treated 17-4 stainless steel with a nitride/DLC finish, it features a 1.375x24 thread pitch and requires direct attachment to compatible muzzle devices.