I bought a G19 Gen 5 slide from Zaffiri Precision, but everything seems to "grind" when I install it. Firstly, the compensator does not fit all the way on, not even close. Second, although the stock Gen 5 recoil spring is used, the gun fails to go into battery sometimes. Thirdly, the Gen 5 aftermarket barrel seems to have a lot of friction against the slide. When I use the stock slide with all my other aftermarket parts, everything works perfectly.

Anyone have this problem with any of their products? Although it explicitly stated the slide is for a Gen 5 G19, I really don't think it is. I don't think it's any of the other aftermarket products I have on the gun, since it works just fine with the stock slide.