RIFLE: WISE ARMS MODEL WA-15B RIFLE, SERIAL NUMBER WA-B03732, BLACK (MATTE), CASE NOT INCLUDED, SEMI - AUTOMATIC, 5.56, 16 Notes: The Wise Arms WA-15B is an AR-pattern semi-automatic rifle offered in 5.56 NATO/.223 Remington configurations, with the model also documented in .300 Blackout. A commonly listed 16-inch 5.56 version features a billet-aluminum receiver, 15-inch M-LOK handguard, optic-ready upper, collapsible stock, and A2-style flash hider. Specifications can vary by configuration, so the exact barrel, finish, and magazine should be verified on the individual firearm. Key points: Manufacturer: Wise Arms, LLC Model: WA-15B Type: AR-pattern semi-automatic rifle Caliber: 5.56 NATO / .223 Remington; .300 Blackout versions also documented Action: Semi-automatic Barrel length: 16 inches on the commonly listed rifle configuration Handguard: 15-inch M-LOK Receiver: Billet aluminum Stock: Collapsible/folding-style stock Sights: Optic-ready configuration Safety: Two-position thumb safety Muzzle device: A2 flash hider Magazine: Commonly listed with a 30-round magazine Trigger: Listed 3.5-lb trigger kit on the 16-inch configuration Weight: Approximately 6.45 lb for the listed 16-inch model Overall length: Approximately 32-35 inches, depending on stock position