The GTL 51 as well as the GTL 52 is a tactical light designed specifically and exclusively for military and law enforcement use. In addition to the Xenon light and the red laser, the GTL 51 and 52 features an IR Light and an IR laser. A centrally placed mode-switch allows for each light or laser to be selected separately or in combination with the others. 
The GTL 51 and 52 are similar, but the GTL 52 comes with the additional feature of a dimmable Xenon light and a dimmable IR laser. 
A hard polymer storage case, a replacement bulb and an adjustment tool for the laser is included with this set.

Available GLOCK Tactical lights:

• GTL 51
• GTL 52