....FWIW, back in 2015 I built my 308Win AR using Aero upper, lower, BCG, carbine buffer system, 16" BA Hanson SS barrel & SLR AGB w/ SLR single port brake. Platform has run 100% reliably from day one with factory Magtech 150gn FMJ, Federal XM80CL 7.61x51 149gn, FGMM 168gn and handloads w/HDY...