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Old April 22nd, 2009, 10:52   #2
Crunchmeister
 
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Join Date: Nov 2007
Location: In your bedroom going though your underwear drawer
Upgrade to metal bushings, a bearing spring guide, and am M100 spring. That should put you in the range you're shooting for. The TM mechbox should last ok at sub-350 velocities.

And yes, those mags are fine.
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