The Rival Arms® Frame Pin Set Gen 3 Glock® Pistols are grooved to provide better retention inside the frame and are perfectly sized for easy installation. This pin kit is precision CNC machined from stainless steel and is compatible with all Gen 3 Glock 9mm handguns except for the G36, 41, and 43. This set comes with a trigger pin, locking block pin, and ejector housing pin.