This is an excellent example of an early, mid-production fully automatic M16A1 rifle manufactured by the Colt Firearms Division with "U.S. Property" markings. These original Colt fully automatic M16 series rifles are very desirable as they were produced exactly as their military counterpart using the same military grade, factory original parts. Usually the commercial model of the M16A1 were all serial numbered in the 9 million range; however, this example is in the earlier 5 million" range. Interestingly this example also has had the bolt carrier etched on the side with "No. 72 5386554" which may indicate that this rifle was once the property of some other DOD agency as they sometimes numbered the bolt carriers to make sure they did not get switched with other rifles in inventory to ensure the correct headspace. This example was produced as a Colt M16A1 series with the forward assist and the two position flip rear sight. The barrel is roll stamped on the underside: "C MP C", which is identical to the military issue M16A1 rifles. The magazine well is roll marked with the Rampant Colt logo over "PROPERTY/OF U.S. GOVT/M-16A1/CAL 5.56 MM/5386554", farther back it is marked "COLT'S FIREARMS DIVISION/COLT INDUSTRIES/HARTFORD, CONN./U.S.A." next to the three-position "SAFE/SEMI/AUTO" selector. It is fitted with the original style M16A1 plastic components with the buttstock storage compartment. It comes with one extra magazine and sling.