The Colt AR-15 is my fav with a 20 inch 1-9 twist heavy barrel,flat top reciever.With the heavy 69 grain bullet,I have shot mine out to 300 yards with great results.
Last week A friend purchased a Stag model (2T)
http://www.stagarms.com/product_info...roducts_id=207
For a short barrel AR-15 I was impressed how accurate it was,My Bushmaster with the same barrel length and shooting the same ammo could'nt come close to matching it in accuracy at 100 yards.
There was plenty of AR's last week at the Bill Goodman's Gun Show in Sharonville.The prices range from 700.00 to 2000.00.
Nick