The Franchi Extended Mobil 12ga F Black Choke is an extended, screw-in Full choke tube for 12-gauge shotguns designed to tighten patterns for long-range/denser pellet concentration. Its extended profile improves shot column transition and pattern consistency; the black protective finish resists corrosion and glare. Confirm your barrel’s thread system (Mobil/Max-7 vs standard) and choke ratings (steel/lead/bismuth) before installation and follow manufacturer torque instructions. Franchi Extended Mobil 12ga F Black Choke 50987