Yes, I pulled the 3.5 Glock connector out of my G17 and installed a 5lb ghost. The biggest thing the Ghost does for you is give you an overtravel stop, one you must fit. The connector as delivered will probably not allow the gun to fire. My trigger now breaks at 5.5lbs, but it stacks quickly and reset distance is miniscule, like a 1/16th of an inch or less, I can really rock speedwise with this gun now. I could make it much lighter but I don't put reduced or clipped striker springs in my carry guns. I stick with polishing, a little trigger bar work, heavier trigger return springs, and good lube. My G34 play toy is about 2.5 lbs and is going to get a Ghost connector soon too. I know you can go lighter than this easily, I just don't want to.