For: Heckler & Koch USP 40C, w/ Light Adapter w/ M6 or M3X (N/A for M6X) 3.58 BBLFeatures STX Tactical Finish. This holster, features the Self Locking System (SLS) rotating hood and the low-ride Universal Belt Loop (UBL) that mounts to a 2″ (50mm) or 2.25″ (58mm) duty belt.