All KKM barrels are made using certified 416R gun-barrel quality stainless steel bar stock. These barrels are then heat treated and vacuum tempered to 42 RC. All of our barrels are CNC machined to obtain superior dimensional tolerances over stock. Because of our advanced proprietary button rifling process, all KKM barrels offer greater accuracy over stock barrels. Our Glock barrels come with fully supported SAAMI spec. match chambers for shooting factory or reloaded ammunition. These are drop-in barrels, no fitting or machining required.
I bought a KKM 10mm Barrel from RockYourGlock for a Mod 20 10MM and wanted a aftermarket barrel for a Mod 40 10mm also. I couldn't find one at RockYour Glock so I went to Lone Wolf. I compared the quality of the two barrels and was amazed that there could be that much difference between the two. KKM was clean and ready to install. Lone Wolf was filthy. Bullet chamber on KKM was more the dimensions of the OEM barrel and the Lone Wolf was a lot tighter. I had to resize all my 10mm reloads for them to chamber in the Lone Wolf barrel. Lone Wolf has their name on the right side of the barrel so that when you install the barrel the name is hidden in the receiver. KKM has their name on the left side of the barrel, so when installed it is visual on the left side of the Glock.
I will be shooting mostly reloads in my brand new Glock 20 and wanted a barely with a fully supported chamber. KKM advertised their barrel as a drop in barrel so I went with them. I shot almost 200 reloads thru it this week and really liked the performance and accuracy of my pistol with this barrel.