ZEV Technologies Pro Trigger is built from the ground up to perform better and more reliably than anything else on the market. At its core is a proprietary trigger bar and professional connector. This Ultimate model has a curved face riveted trigger and black housing and safety. It is compatible with G19/G17/G34/G26/17L Gen1-3. Included is a trigger bar, Pro connector, firing pin safety and spring, Pro striker spring, skeletonized striker, trigger spring, and ejector housing.