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MG42 crushes brass


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  • 2 weeks later...

On my semi auto MG42 I got the gun to stop doing this by tuning the booster and nozzle, which changes how fast the bolt is driven backwards to eject the brass. I opened the nozzle bore to 1/2" and the booster is 8 clicks from tight. 

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  • 1 month later...

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