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depends on your definition of a good fit , will it thread and be solid and work as advertised ? YES ....... the issue is your personal choice the +3 mag ext will extend past the 18.5 inch barrel by about 3 inches ...... if that is a issue for you get the +2 ext it only extends past about a 3/4 inch.
I installed this +3 mag extension on a CZ612 which is an awesome shotgun for the price. The extension device is very well made and works as advertised. The only issue is that the orange shell tube plug causes the last shell to jamb. I replaced it wit...
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Product Info for Choate Tool Cz 612 - 8 Shot Magazine Extension
Upgrade your shotgun magazine with this Choate Tool Cz 612 - 8 Shot Magazine Extension to increase your ammunition capacity by 3 shells. These Magazine Extensions by Choate Tool are constructed from solid blued steel to add more durability to your weapon extension. The Choate Tool Cz 612 8 Shot Magazine Extension comes complete with a spring, follower, and clamp, allowing you to install and use it right out of the box. Pick up the Choate Tool Cz 612 8 Shot Magazine Extension for a more durable way to increase your ammunition.