Girsan MC312, Inertia Driven Semi-automatic, 12 Gauge, 3.5" Chamber, 28" Barrel, Matte Finish, Black, Polymer Stock & Forend, Screw-in Chokes, 5 Round 390145 • Action: Semi-Automatic • Capacity: 5+1 • Finish: Black • Sights: Fiber Optic • Barrel length: 28 • Overall length: 50 • Inertia System/ Rotating Bolt HeadInertia Driven System Integrated Picatinny Rail Vent Rib Barrel • Action: Semi-Auto • Capacity: 5 + 1 • Finish: Blue • Sights: High Visibility Sight • Barrel length: 28" • Overall length: 50" • 15in Free-Float MLOK Rail/ Ambi Bolt Release