LaserLyte returns to basics with the patented RTB-GL rear sight laser that fits all GLOCK firearms. The high performance laser built into a rear sight specifically designed for all GLOCK pistols features a simple, ambidextrous “press and go” activation. The laser is easily programmable to either constant on or pulse mode. Another great feature is the “auto-off” feature that displays a unique flash after 5-minutes of operation and automatically turns the unit off after 6-minutes.