I have used the search function but nothing came up. If this question has been asked before my apologies. I am thinking of getting another AR, this time a rifle (I have a carbine/M4gery already.) My question: how much practical difference is there between a govt. profile barrel and a heavy barrel (20")? I know that the govt. profile would be lighter and, theoretically, the heavy barrel should be more accurate. But for the average joe, average shooter, not trying to do 300+ yard sharpshooting, but wanting something for range fun and shtf (heaven forbid) is one a better choice than the other? And if so, why? Thanks in advance!