DIAMONDBACK FIREARMS DB-15 PISTOL Manufacturer: Diamondback Firearms Model: DB-15 Pistol Type: Semi-automatic pistol Platform: AR-style Common caliber: 5.56 NATO / .223 Remington Action: Direct-impingement, semi-automatic Magazine: AR-15/STANAG pattern magazines Barrel length: Varies by specific DB-15 configuration Overall length: Varies by configuration Finish: Typically black Sights: Varies by configuration; many versions use a Picatinny rail for optic/sight mounting Stock: Pistol configuration, typically with a stabilizing brace or other rear assembly depending on version