Bravo Company Machine BCM4, 5.56mm cal. auto carbine. Serial# W04007. Excellent like new condition. 16” barrel with 1-7 twist and an excellent chrome bore. Mid-length gas system. Matte black finish is 98%.  Magpul Moe handguard and vertical grip. BCM pistol grip with storage. Six-position stock. A3 upper with BCM rear flip up sight. "F" marked front sight. Ambi-saftey. Nice clean trigger.  These are highly respected rifles and are among the best on the market. A high grade AR!