1911 guy
Member
There's no "magic" in the BCM carrier and bolt, but for the cost over long term, I'd rather spend the money up from (and have in the past, will do so again) to get a product that has been individually tested and known good rather than batch tested. Like you said in the O.P., you can skimp in some areas of an AR build and get away with it. Barrels and bolts aren't those areas. I'm no guru, but I think you made a good choice.