I really don't know! My main focus was to find out what the weapon was worth, I was contemplating selling this one and buying a lower and installing a pre ban M4 Flatop complete upper kit with the A2 flash hider and collapsable buttstock which now I know could result in serious consequences. This weapon has the A2 sights, A2 flash suppressor, A2 lower receiver which can't be converted to full auto and the front sight has no bayonet lug. The flash suppressor and pistol grip add up to the 2 evils and if you and I can find out if its legal,damn I'll just have a convertible! One positive though is that mine easily held 1 MOA with the small aperture sight at 100 yards on the bench! It is damn accurate and I would love to scope it and check it out. If only my funds were not limited, I would try to acquire a Trijicon TA-31 and leave well enough alone. Congrats on your purchase, I honestly believe you'll be ecstatic in your choice!
Bet Regards
MACGRE3