07-16-2017, 03:02 PM
Klem et al - fair enough; perhaps the heat treatment is not worth the side effects. The armorer I was working with seemed to think it would "set" the Loctite 620 in place. Heating or not; I still think the bedding and lapping are worth it. My question is should this ALWAYS be done when assembling an upper, or or only done if you are having accuracy issues? The reason I started done this road is (1) this was my first upper assembly and I wanted a pro to double check my work, and (2) the rifle was shooting 2" groups at 100 yards.