I never thought I would say this but I have too many guns and want to optimize, I am set with my RRA 556, but I also have an M!A and a DPMS AP4 with an 18 inch barrel. I want to upgrade the 308 semi guns I have so am thinking about selling both and getting a higher end 308 AR, which one should I go for with the money I can get from selling the two guns above. It will be used for paper punching and any future zombie attack.