Help with Malfunction

Bowhntr6pt

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Nov 10, 2024
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Ok... took the 320 to the range after a good cleaning and lube, using IMI 25-round mags, Fiocchi 115gr FMJ.

On occasion, I get a malfunction where the bolt doesn't close fully... from here when I pull the trigger the bolt seats but doesn't fire.

Sometimes it does it once or twice per mag, sometimes no problem.

Polish feed ramps?





I'm awaiting grips lol.

Seems to extract and eject just fine but won't chamber 124gr Gold Dots. Those jam into the ramp due to the open front.
 

AKarms

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Feb 12, 2024
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New Hampshire
Ok... took the 320 to the range after a good cleaning and lube, using IMI 25-round mags, Fiocchi 115gr FMJ.

On occasion, I get a malfunction where the bolt doesn't close fully... from here when I pull the trigger the bolt seats but doesn't fire.

Sometimes it does it once or twice per mag, sometimes no problem.

Polish feed ramps?





I'm awaiting grips lol.

Seems to extract and eject just fine but won't chamber 124gr Gold Dots. Those jam into the ramp due to the open front.
Picture of feed ramp?
 

AKarms

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I don’t see anything “wrong “ id try different ammo, then polish the ramp and bottom edge of chamber some
 

gundisaster

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Houston, TX
Yeah most UZI’s prefer FMJ’s. The semi-auto feed ramp is definitely an improvement over the stamped full-auto ramp. Might need to break in your mags. Or download them a bit. Too much spring pressure will create more drag. Also check your top cover gap with feeler gauges. Again too much drag can cause issues. Lube is good too. You can try polishing the feed ramp. You can tinker with the mag height by adjusting the mag catch. Might need to just break the gun in a bit more. But yeah as always most semi-auto malfunctions are caused by mags or ammo. So try different mags and ammo.
 

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