A few thoughts from me.. You cant go wrong with a Bushmaster or a Colt.. The sig 556 is pretty pricey compared to the Bushmaster at least... IIRC the colts are pretty pricey as well and there are some other mfg that are just as good quality Rock River Arms and Spikes Tactical are two that come to mind right off..

I have a bushmaster lower and 3 different uppers (16" shorty 5.56, .22 dedicated upper, and a 450 Bushmaster).. its a fun gun to shoot and quite versatile..


if you check out ar15.com someone there can help you with the legalities of NJ ownership and give you reviews of the different mfg's.

brian

good luck