22lr barrel makes a differance - CMMG, Inc Barrel Sub-Assemblyy, 22LR, 16in

I purchased this barrel for my new AR-15 22LR upper build. When building the upper, the barrel married up to the upper receiver incredibly tight, bUT nI thing a ltitle elow gtease couldnt fix. It's a solid barrel and my grouping has tightened up considerably. My grouping could be tighter, but that could be the ammo. Worth buying, if you would like to build a dedicated 22LR upper.