Colt AR15 / M4 / M16 bolt extractor replacement upgrade

Colt original OEM part;  this is the heavy-duty extractor upgrade or replacement.  For a bolt tune-up, this is a good place to start for an M16, M4 or AR-15.  This is also an upgrade for short barreled rifles, like a 10.3" Mk18 which sees extreme pressures, high-energy and rapid bolt action.

Contains spring and the rubber bumper.

Manufacturer's Part Number SP 64026