Glock Inc. Glock Trigger with Trigger Bar Gen 4 Grooved Trigger. For GEN4 guns it fits G192326273233. It features a serrated (grooved) trigger and is standard issue to these guns however it will also fit the G37 45GAP. Will not fit the G36. Specifications for Glock Trigger with Trigger Bar Gen 4 Grooved Trigger 6A22C9DB: Manufacturer: Glock Color: Black Caliber: .45 GAP .357 SIG 9mm Luger .40 S&W Gun Make: Glock Gun Model: Glock 39 Glock 38 Glock 33 Glock 27 Glock 37 Glock 26 Glock 32 Glock 23 Glock 19 Model Generation: 4 Package Contents: Glock Trigger with Trigger Bar Gen 4 Grooved Trigger The GLO-4497 trigger with trigger bar is listed by Glock Inc as fitting the G38G39 45 GAP for GEN3 guns. For GEN4 guns it fits G192326273233. It features a serrated (grooved) trigger and is standard issue to these guns however it will also fit the G37 45GAP. Will not fit the G36. 4497