KG1602 does a review in Dutch, of the 5KU GB255 Glow Sight Set for Tokyo Marui G18C/G17 Gas Blowback Pistol that he installed on a WE Airsoft Glock 17 Gen 4 Gas Blowback Pistol. This glow sight can be purchased from the EB Airsoft online store... "Night sight for a TM G17 on WE G17 gen 4 installation and review."