Colt AR-15 SP1, mfg date is 1976, Our Bicentennial! Rifle is in excellent condition. Can provide more pics on request. I always understate the condition on the standard description. This rifle appears to have been shot very little, bore is perfect... immaculately clean inside and out. Originally I thought it to be unfired but I do see signs that it was fired. Feel free to contact for info and/or pics.