Hey Sam ya i got this AR in 1996 for NRA match competition. Its a Colt model ..6601 heavy barrel 1-7 twist. tack driver, wish i could still shoot as good now as back then. THANKS for watching ! Also i just got back from the gun shop were i picked up a M1 carbine that is untouched.. gonna make a new video of my excellent find, i cant belive it.