Ok thanks a lot guys, but I have one more question (for now... :P)
Would you recomend the ER 25K or the M8A3 over the M4? The only upgrades I would likely get are a bipod, scope, and maybe a barrel extension. I am leaning towards the ER because of its looks, its rails, and its included barrel extension. It is also 400 FPS out of the box.