I'd do an aero lower and aero stripped upper, piece the rest together yourself. What I did. Though my rifles haven't been out to play since the great ammo depression...(shortage and 200% inflation in price per round) I still have plenty of ammo, but I'm holding onto it until I can replace what I use affordably. Price per round currently is just absurd. $1/rd for the cheap 7.62x51 ball, and over $2/rd for the SMK .308... I used to pay $0.90/rd for SMK and $0.45/rd for 7.62x51 ball. And when I say "used to" That was less than 2 years ago.