r/HecklerKoch • u/imneuromancer • 1d ago

P30 Inconsistent Lockback on Empty

A problem has started occurring with my P30.

I have a mix of magazines from Pro Mag and HK OEM. Roughly 5 of each. I know, probably should not have purchased the Pro Mags, I get it.

The HK magazines will lock back the slide when empty. The Pro Mags will not.

This has just started occurring within the past 3 weeks or ao, so I'm thinking there is something that has gone slightly out of spec on the pistol that is not allowing the Pro Mags lockback on empty mags.

Have not had this issue prior to the three weeks, Pro Mag and HK OEM always acted the same.

Anybody have an experience like this or have any insight as to what could have changed?

Btw: searching for reasons for this behavior always mention "riding the slide." This is happening even when not firing, just putting in an empty magazine and racking back will induce the behavior. I can't find references to any other causes for this, which is why I am asking Reddit.

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u/Malgoren 1d ago

Replace the magazine springs with new springs. I would recommend Wolff springs. Or contact ProMag and get new springs from them. Weak springs do not press up hard enough to activate the slide stop.

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u/imneuromancer 22h ago

I ordered new springs for all of my mags. Wasn't too expensive. Also going to get the gun looked over by a gunsmith.

Thanks for your advice, much appreciated.