Therse are used M-16 Colt bolt carrier assemblies off of police trade ins. The carriers are marked C and bolts are marked MPC. They have all been function checked in my rifle. These are some of the best looking ones ive got. Price is $110 shipped via USPS Priority mail for #2-#7. #1 is $100 shipped due to it has less finish left. Please post on here first which number you want then email me with the info. I take Paypal and Money Orders.