Had to be fitted to slide - SilencerCo Glock Threaded Barrel

First off this barrel went into a Legion Slide for a Glock 17 from across Armory. Cross Armory’s website stated in the description it has tighter tolerances than OEM because it’s machine from billet aluminum. When putting the Silencer Co. barrel into the slide it would not go into battery. It was rubbing on each side of the chamfers where it locks up to the slide. I tried another barrel to see if the problem was consistent to determine if the slide was the issue or the barrel was the issue. I found out it isn’t the silencer co. barrel it’s actually the slide… I messaged the seller from we’re I purchased the slide, and he got back with me and showed me we’re it said in the description “made with tighter tolerances than OEM” initially, I stated to him that the slide was out of spec, and I needed an exchange. Once I confirmed, it was just a tolerance, stacking issue. I went ahead and took my dime in files, and slowly started taking off material from the barrel rather than the slide. Upon initial inspection of the silencer company barrel the finish in machining was amazing. After taking off material, I noticed the black nitride finish rubs off very easily. This is not an issue for me since it’s covers and out of sight. Once I matched it to the slide, the lock up is very tight, but functional. This should help improve accuracy. I still have not tested the function of the barrel. Overall, I am very happy with my purchase, especially for the price point Optics Planet has these barrels listed for. Free value shipping truck.