Black Rain Ordnance Spec15 Series AR15 5.56mm Semi-Automatic Rifle FDE with MFT Milspec Buttstock for sale. Black Rain Ordnance manufacturing standards are prominent throughout the line of Spec weapons, allowing the production of the highest quality rifle with a cost-effective price tag. The Chromoly barrels and Black Nitride Bolt-Carrier Groups in the Spec Series combine to provide the reliability and dependability you expect from the BRO family of rifles. Whether its your first rifle, a patrol weapon, or simply supplementing your collection, the Spec Series is a great addition to your lineup.