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Old 01-06-2010, 05:16 PM
mar53 mar53 is offline
 
Join Date: Oct 2009
Location: Northern California
Posts: 305
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I have used 30 round magazines with the older 15 round mag catches and they do work. I have never tried however, a FULL 30 rounds. The theory is that the magazine will be unstable due to the weight, without the Type 4 catch, that is why they designed the new catches.
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