89003 ProTac 2.0 2000-Lumen Rail Mount High Lumen Tactical Rechargeable Long Weapon-Mounted Flashlight with SL-B50 Battery Pack and USB-C Cord, Black. LED technology, impervious to shock with a 50,000-hour ; multi-function push-button tactical tail switch; securely fits a broad range of weapons; mounts directly to guns with MIL-STD-1913 (Picatinny) rails Choice of three operating modes: high/strobe, high only and low/high.