A buddy loaned me both his Glock 20C in 10mm auto and the matching KKM Precision drop in match grade barrel for both a gun review and product review. Well, I had time to get the barrel review finished but the gun review is gonna have to wait. KKM Precision makes barrels in a variety of configurations for all of these types of handguns, 1911, CZ-USA, Beretta, S&W, FN FNP, Springfield XD, Browning and Glock. The barrels are all match grade button rifled for extreme accuracy and a perfect fit. The barrel we tested was the 6″ 10mm Auto model for the Glock 20. Check out our video review below for the full scoop on how it feels, what it looks like and most importantly, how it performed compared to the standard factory Glock barrel.