ZEV Technologies has updated the design of the ejector housing to be compatible with Glock Gen 1-4 models in 9mm. The ZEV Ejector Housing includes the newly designed ZEV ejector featuring a wider contact surface area for better ejection. It is now easier than ever to finish your trigger upgrade with 100% ZEV manufactured parts. Compatibility Glock 17 (1st - 4th Gen) Glock 17C (1st - 4th Gen) Glock 17L (1st - 4th Gen) Glock 19 (1st - 4th Gen) Glock 19C (1st - 4th Gen) Glock 26 (1st - 4th Gen) Glock 34 (1st - 4th Gen)