Choate Tool Beretta A-300-10 Shot Extension Blue. 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. Note: This item is not compatible with the A300 Outlander Models. Specifications for Choate Tool Beretta A-300-10 Shot Extension Blued: Manufacturer: Choate Tool Finish: Blued Magazine Capacity: 10 Round Gun Make: Beretta Condition: New Country of Origin: USA Features of Choate Tool Beretta A-300-10 Shot Extension Blued: Beretta A-300 +5 Magazine Extension (Blued) Package Contents: Choate Tool Beretta A-300-10 Shot Extension Blued Choate Tool CMT-20-04-15: Beretta A-300-10 Shot Extension Blue