Great rolling break - Ghost Inc Edge 3.5 Pound Trigger Control Connector Drop In For Glock Gens 1-4

As a big DA/SA fan, this is the closest I can get a striker fired handgun to have a similar "rolling break". It took a little bit to break in but it has preformed flawlessly in my Gen 4 19. Regardless if you get the edge model, all the Ghost Inc products have been quality in my experience.