The GBD-IIIC is an equipment mounted non-lethal visual disruption system. It is a Class IIIb (ANSI class 3b) laser that emits a concentrated beam of visible green light at 532 ± 10 nm at a maximum of 250 mW (140 mW typical). This laser device performs two functions; to provide a decisive hail and warning signal in excess of 1 km. and to visually disrupt the critical task of a targeted subject. This laser device is weapon mountable and can be zeroed to the weapon with an optional ELCAN mount. Several safety mechanisms are provided to prevent accidental exposure.

The GBD III should be used in weapon mounted mode. The GBD III mounts to the M16A2/A4 service rifle, M4A1 Close Quarter Battle Weapon, and the M1014 shotgun via an integral MIL-STD-1913 rail attachment bracket.