The LG-852 Lasergrips for the Glock GEN4 26, 27, 33 are specifically designed for the unique contours of 4th Gen GLOCK Subompact pistols, the rear activation LG-852 offers a repeatable sighting advantage for your pistol. These Lasergrips provide the versatility of instant activation from a rear switch. Mfg: Crimson Trace Corporation