L3I's Billet CZ 457 magazine extensions are the most durable and reliable magazine extension on the market to date for your CZ 10 rd plastic magazines. These are made from high quality 6061-T6 aircraft grade Aluminum. These extensions offer an additional 3 rounds for those times when you need that extra shot in a split second!
*** This is for extension only, does not include magazine***
Reviews
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L3i Magazine Extension
The L3i aluminum mag extension works great but only if you can get the spring and follower to line up. Your mileage will vary, but for me, one mag worked well off the bat, and the other I had to play with the spring, bending it and compressing it. The two main culprit I noticed is the following: 1. The spring may bind up with itself preventing it from springing up all the way sometimes. 2. The follower get hung up on the transition to the mag extension. A solution would be to bevel the bottom of the follower or the mag extension where it slides over. Hope this helps.