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Old July 19, 2010, 08:48   #164
FALaholic #: 10395
Join Date: Apr 2003
Posts: 1,731
Ploease note this experience with the CMI 25-round M14 mags:

CMI originally made the 25 round mags with the same spring as the 20-rounders. The spring was then too short, not allowing enough pressure on the heavier and longer ammo stack.

I bought several when they came out and had feeding problems.

CMI has now modified the 25 round mag springs by adding an additional coil. Those work fine.

So if you do decide to make 25 round mags, please consider the possibility that the springs may need to be longer (or stiffer) than the current 20 round springs.


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