G-series for Glock Pistols, fits G19, G23, G25, G32 and G38 models. This is a RED laser, like new in box with papers, tools etc. This is for a Gen 3 and I don't know if it would fit a Gen 4, I suspect it will. I would like to trade it for the full size version in like condition. Or sell for $135 shipped, cash or USPS Money Order. I don't do PayPal or low ball offers. Thanks for looking.