Designed with tactical shooters in mind, the EPS2-300 offers a 2-dot ballistic drop reticle that allows the shooter to zero either subsonic or supersonic rounds in the same reticle pattern. Offered in the XPS2 platform, it is the shortest and lightest HWS sight available. Featuring a .300 Blackout/ WHisper custom laser etching on the hood and waterproof capability up to 10 ft, functionality and durability are at the forefront. Mounts to a Weaver or MIL-STD 1913 rail. Utilizes 1 123 lithium battery and has a runtime of 1000 hours at a brightness setting of 12. View Operator's Manual for XPS2 300 Blackout PDF. Mfg: Eotech