Zev spartan slide - ZEV Technologies Z19 Spartan Gen 4 Stripped Slide w/RMR Cover Plate and Free Glock Trigger Upgrade

The build quality is what you would expect from zev and it is beautiful. I have 2 issues with this slide. The first being it did not fit well on the rails. I bought a stock gen 4 19 for a build and it would hit the trigger bump every time. I swapped to an apex trigger which helped but i should not have had to get a new trigger to make it work in my opinion. My other problem is it still has hang ups when riding the rails. I had 8 failure to feeds across different magazines and grinding when cycling. for the price and name i would expect more. I ended up dropping it off at a gunsmith who said the rails need to be polished, the inside rails of the slide need to be polished, and need a new recoil spring (may or may not be related). Overall really nice slide but did not work well with any of the stock glock interals