Has anyone tried .40cal mags in a 9mm KelTec Gen 1 or 2 Sub2000?

Gonna have to be a little more specific then that. Wich generation rifle? Was it Glock, Beretta or Sig mags?

I’ve heard KCI Glock 40 mags work well. Glock brand mags aren’t worth messing with imo. My experience with Beretta is also a no.
 
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