I went to a gun show recently with a friend and its interesting to see the M4's for sale and how many post-ban guns have what seems to be falling prices right now.

I'd love to pick up an AR and tune it up for a varmint rifle. I favored the M4 ever since I layed eyes on it and now they're available. I know a longer barrel would probably be better for varmints, but I've always loved carbines for some reason. I believe the M4 comes with a 16 inch barrel.