I recently picked up a minty Bushmaster A2 HABR rifle from a member here that didnt have many details on the rifle. I have emailed Bushmaster and they said they cant help me since it was built at their old facility and they had to turn all the records over to the ATF when they relocated. All they can say for sure is that it was built before 2001. The rifle is a model number XM15-E2S. The SN is L080XXX. The receiver is stamped 'B.F.I.

The barrel is stamped 'C MP 5.56 NATO 1/7 HBAR' It is a fixed carry handle A2, the forward assist is foot shaped. The barrel has an A2 style flash hider. The finish is in good shape but it looks like there wasn't a whole lot of prep time spent before the finish was applied. There is no bayonet lug. Is there any way to get a better idea of around when this rifle was built?

Also as to the stamping on the barrel 'C MP' I have found several places online that say that Busmaster at one time got barrels from Colt but there are also places online that say this never happened.Anyone have any ideas? Click to expand. Headwind Sms Communicator Serial Season more. Well, you would have been correct at one time.

The very early M16's only had the MP markings by the FSB and the C in a square Colt proof mark on the barrel breach. Starting in October 1967 and prior to serial number 800,000 Colt’s added chrome to the chamber. Chrome chamber barrels are identified by a C about an inch back from the muzzle. By 1969 and before serial number 1,750,XXX Colt's chrome chamber barrels were marked C MP C, and the proof markings and C were moved to the same spot. Effective in December 1971 at about serial number 4,700,000 along with the chamber the bores were chromed, early ones were marked C MP B. Telecharger Driver Bluetooth Samsung R530 Laptop.

Starting in 1974 and after serial number 4,900,000 chrome bores were marked C MP CHROME BORE. This marking was used all the way until the end of M16A1 production.

The Bushmaster M4 is a semi-automatic or select-fire carbine manufactured by Bushmaster Firearms International, modeled on the AR-15.