Technically yes but I've never used them. To be honest I always thought Magpul was/has been mostly overated. Very 2002 AR. I have their AR mags and they've all been good but I don't go out of my way trying to get anything else
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Point being the PSA 9 is going to be easier/cheaper to accumulate bullet clips for.
Do either the PSA or KUSA feed JHP? Just a guess but I'd say the original Russian SMG is spec'ed for FMJ. If the KUSA is authentic in general design it may need some chamfer work to feed defensive ammo.