RIFLE: WISE ARMS MODEL B-15, SERIAL NUMBER 02108, BLUE, CASE NOT INCLUDED, SEMI - AUTOMATIC, 5.56 NATO, 16 Notes: The Wise Arms B-15 5.56 is an AR-15-pattern semi-automatic rifle chambered for 5.56x45mm NATO. Configuration details can vary between individual examples, so features such as barrel length, handguard, stock, sights, and magazine should be verified from the specific firearm. Manufacturer: Wise Arms Model: B-15 Caliber: 5.56x45mm NATO Type: AR-15-pattern rifle Action: Semi-automatic Operating system: Direct-gas-operated Barrel: Configuration-dependent; 16-inch examples have been reported Receiver: AR-pattern receiver Handguard: Configuration-dependent, including M-LOK-style examples Magazine: Detachable Finish: Configuration-dependent