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 model has a curved face riveted trigger and black housing and red safety. It is compatible with G19/G17/G34/G26/G17L/G22/G23/G27/G35/G24/G37/G38/G39/G31/G32/G33 Gen1-4.