What ammo is he using? I suspect you guys were shooting M193 or something with a a similar power level. They build a lot of guns to cycle on cheaper ammo, so the guns tend to be overgassed. They can't account for all variables at the factory, not to excuse them. He should call CS describe the problem and ask if they can send a heavy buffer. Beats sending a gun back, it's a $10 part and a 1 minute fix.
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