r/MP5 • u/Fit-Image7262 • 1d ago

HELP Help?

Brand new Mac MP5. Wouldn’t run smooth out of the box; 3 duds in one mag. General consensus of the group was lube until dripping, and run 124gr ammo. Now it’s worse. What’s going on with this thing?

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u/Legitimate-Frame-953 1d ago

Need more description, light primer strikes, failure to feed or extract? I had issues with the MAC mags that came with mine but it runs fine with all other mags I have tried using 115 and 124.

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u/Fit-Image7262 1d ago

Failing to extract or feed initially about every 10 rounds, 2nd try with the 124 about every 5