We may be on Gen 5 guns from Glock's perspective, but Apex Tactical isn't forgetting all of you who are still running those tried-and-true Gen 3 and Gen 4 guns. This Action Enhancement Trigger Kit is designed as a drop-in replacement for several of your factory trigger components and it'll ensure a better shooting experience. Each Apex Tactical Action Enhancement Trigger Kit ships with a trigger body, Performance Connecter and an Ultimate Safety Plunger. However, this particular kit does not ship with a trigger bar, so consumers will have to mount this Apex trigger body onto the OEM trigger bar. The new trigger, connecter and plunger all work together to provide a lower trigger-pull weight, shortened trigger travel, a reduced reset and a crisp, clean trigger break. Trigger shoes are available with either a black or red finish. Even with all of these enhancements, the Apex Tactical Action Enhancement Trigger Kit maintains all factory safety values, since the trigger includes a center-mounted pivoting safety. The kit will fit Gen 3 and Gen 4 models of the following Glock®pistols: G17, G17L, G19, G22, G23, G24, G26, G27, G31, G32, G33, G34, G35, G37, G38 and G39."