I've had my Colt AR-15 A3 H bar elite,stainless bull barrel,flat top model for 3-4 years and love it.It has the free floated barrel,aftermarket trigger,and all the accuracy things on it right from colt.I put a 6-24X-50mm Tasco World Class Plus scope and harris bipods on it and soon to put on a different grip(looks good).I use it mainly for ground hogs,crows and coyotes.I love it!