Beware - I have the following.

Tangfolio Witness x2
Mini Uzi x 2
KWC PO8
Mauser
Beretta 92 A1
Walther PPK

All are less than 5 years old and only the PPK still works although the CO2 bulb holder is distorted and the grip doesn't fit. The others all jam and are now, effectively, static models.
I take good care of my guns but modern blowbacks are not built to be used much. They look great but imo are a waste of money.

Against this I have a 50 year old Crosman 451 and 45 year old 600 which both work perfectly.