Failed to feed and light striking - Patmos Arms Revelation Glock G19 Compact Complete Slide Assembly

As they say, when something is too good to be true, it usually is. I was astounded at the price for this complete slide kit so I ordered it. I had already installed a Trybe slide from OpticsPlanet on one of my G19 Gen3 and it worked GREAT. So this one must be good also, right? When I installed this slide, I noticed it sat a little too far forward on the G19 Gen3 frame. Same with a Gen2 frame. It fed fine with 9mm snapcaps so off to the range I go. At the range, it failed to load ANY factory ball ammo (SB, American Eagle, UMC). I tried factory and Magpul mags, no dice. When I manually loaded a round into the chamber, it failed to go fully into battery without a shove on the rear of the slide. When I pulled the trigger (with much hesitation), it failed repeatedly to ignite...light strikes on the primer. I tried the Patmos slide with a factory G19 barrel...same results. I didn't go further into investigating the issue because if the slide is the problem, there's no point in wasting any more time. Luckily OP has a great return policy. Guess I will try other slides next.