For example: DPMS, PSA aka Palmetto State Armory, Armalite, Colt, Fulton Armory and Windham Weaponry. I like RRA but they don’t accept PMAG’s which is a deal breaker for me. I’m leaning towards Armalite, Windham and Fulton. Budget is $1500-$2200, no more! NO pistons, too expensive. I'm leaning...