Thread: ZK update?
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Old 01-12-2011, 9:54 PM
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Addax Addax is offline
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Quote:
Originally Posted by Unit74 View Post
What are the differences between the ZK and my current ATAC?
The ATAC utilized the PWS Long Stroke Piston System.

The new Addax ZK Piston Uppers utilize our new ESS Piston System that we have developed.

We wanted to offer a new series of GPU's that allowed for more flexibility with being able to utilize different handguards, rails, and offering an 18" Mid-Length barrel option.

You can find more info. on our new Addax ZK Piston Uppers here: http://www.calguns.net/calgunforum/s...d.php?t=274338

and here: http://www.calguns.net/calgunforum/s...d.php?t=375348
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Last edited by Addax; 01-12-2011 at 9:59 PM..
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