Matrix Arms Alpha slide for Glock 19 Gen 1-3. Assembled and ready to mount on compatible frames. PVD Rainbow/Oil slick/Chameleon finish. Finish will wear with metal to metal contact.All slide internals installed with dual-action recoil rod. Tall sights for co-witnessing with an optic. Matte crown/flush cut titanium nitride barrel. Finish will wear with use and metal to metal contact.Consult a qualified gunsmith for install. Requires lube and a break-in period.