ive never owned one, but ive always wanted a colt, ive never heard anything less than great about them, i cant remember if its colt or armalite that the military uses, someone enlighten me, but the atlantic arms ar15s aretn to good unless you only use high quality remington, winchester or other brand name ammo, because the others, the laquer coating on the ammo will liquify when you shoot and it gets in the chamber and hardens, thus causing poor ejection, and if it goes on too long, causing the bolt to not close