I just ordered a KKM 10mm barrel and SS captured guide rod for my Glock20
I've heard that the KKM barrels are one of the highest quality replacement barrels for the Glock. The new barrel, along with the heavier 20# spring on a captured guide rod, should make this a fine shooter with stiff cast bullet and jacketed loads, not to mention giving much longer case life. I think if it turns out to be as accurate as my OEM barrel, I may just sell the stock barrel.
Anyone here use the KKM barrels? I'd love to hear your input.