I know this is beating a dead horse, but I wanna go ahead an place an order for a stripped AR lower this week. CMMG, RRA, Stag? Are all mil-spec lowers created equal? I'm still seeing a $50-75 difference based on name alone. I've seen several pictures of lowers next to each other, with people commenting about flash here, and rough spots there... Honestly, at my level, I don't see the differences.