Random blank firing with lonex pmag

[steverebo]

So I'm having issues with my sa-07 edge and lonex 200 round pmag mid caps. I randomly get nothincoming out if the barrel. I have looked into the hop  hamber and I can see a small lip from my maple leaf hop rubber. I have heard of potential issues with zci barrels and maple leaf rubbers but the drop test seemed fine.

Do I need to trim away this tiny lip?

 

[BigStew]

Have you tried with another brand of mags and different BBs. Make sure it's not them before cutting anything up.