"I have heard all [b]new[/b] orders for the AR rifle, are for the M4A1. I am not sure if that is an Army or Marine thing. I am not even sure it is accurate????????"
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From the most recent items i heard the marines came to the conclusion that the m4 was not as good as the m16a4 and they have decided that their next rifle evolution will be the A4's and not the m4s, that is of course, minus the units and personal that already have them.
As to the army, we can still gets A2's, i just recieved 8 new ones the week before xmas, you can get the A3, my unit isnt authorized but the full auto fun would be sweet, and some infantry units seem to be splitting it like 75/25 between M4's and A4's.
as to brands, we had FNs when i was in basic, but everywhere since i`ve had colts. strangely enough, i belive that some of the M4's at my last unit were bushmasters.