Not cool
Requires barrel to slide fitting that ruins the finish. When it arrived the barrel was locked so tight to the slide, I had to use great force pushing chamber straight down to unlock it. Had to resize chamber in barrel because rounds were locking in the chamber. Chamber measured smaller than a factory glock barrel. Slide worked well with factory barrel. Looks like the barrel is the weak link in this setup. Spend the extra $20 for a Glock manufactured upper instead of spending $70 at a gunsmith like me.
Verified purchase: YesCondition: New