I was in favor of going to either gas .308s or a 50/50 bolt .308/gas .223 team model. For my former group there was never a deployment that couldn’t have been handled by a RECCE or SPR type AR set up, though it wouldn’t have been a bad idea to have something bigger available in case barrier penetration was a factor for the situation. That said I never could convince the powers that been to adopt it, too much of the “this is how we’ve always done it” mentality combined with a lack of technical knowledge.