Can't get it to fuction - Zaffiri OPMOD MG9 Glock 43/43X Flush & Crown Pistol Barrel

I purchased the chrome model for one my custom G19 builds. I have other higher end barrels and they all run fine. Keeping in mind the lock up on these is very tight. Cerakote only worsens that issue. Since it wouldn't feed properly in the gun I bought it for. I decided to try in a couple of other perfectly working guns. NO LUCK.No matter what I did and using lube, changing the spring, I tried any and everything and finally gave up on it. I know you can polish or sand it to loosen it up. But, it should just work. So now I have a nice chrome paperweight. I replaced this one with a L2D and it runs perfect now. I guess you get what you paid for.