Don't you love how Airsoft companies misidentify guns? ;)

[ManiacallyChallenged]

My airsoft mini UZI clearly holds 39 rounds.
This is obviously the correct number on the real world model.
It also holds one CO2 powerlet. So I must assume there was one on the real mini UZI.

You're right about the cheap guns, some of the spendy models have trademarks. Like the CYMA company selling a badly designed Glock 36 under the name "Combat Delta."