I was looking up some AR-15 companies and came across a manufaturers web site I think it was DPMS and there was an AR-15 chambered in 7.62x39. I was thinking of getting a M4 carbine, but I am not a real big fan of the 5.56 round. Does anyone know if the legendary accuracy of the AR style rifle is compromised by being chambered in 7.62x39. Or am I better off looking at the AR 10 in .308. I am thinking long term in that the 7.62x39 is much cheeper to shoot than .308.