slrrifleworks.com
I invested in 1 of these for all 4 sized journals (.625, .750, 875 & .936). Never had any questions about alignments after that! I prefer the bottom screw type than clamp or pins for the ease of it. Now I just need to get someone to ream the gas ports so the problem children (barrels) will get back in line again. The 1st 2 6.5G I had were tight chambers and loosened up after 50-100 rounds. when going together with NEW parts there shouldn't ever be any question if they work, but some slip thru the cracks with qc. Diagnosing online can be difficult especially if the person doesn't have the tools necessary to answer/address the issue(s).