Choate Tool Beretta A-300 8 Shot Extension Blued12 Gauge. These extensions are great for law enforcement officers hunters and competitive shooters by giving them a greater magazine capacity. They are also a must for home protection. These kits are constructed of solid blued steel and come with spring base clamp & follower Specifications for Choate Tool Beretta A-300 8 Shot Extension Blued: Manufacturer: Choate Tool Finish: Blued Magazine Capacity: 8 Round Gun Make: Beretta Country of Origin: USA Features of Choate Tool Beretta A-300 8 Shot Extension Blued Beretta A-300 +3 Magazine Extension (Blued) Package Contents: Choate Tool Beretta A-300 8 Shot Extension Blued Choate Tool CMT-20-04-13: Beretta A-300 8 Shot Extension Blued12 Gauge