KWA/Umarex rebranded full metal CZ75 all in.System7/NS2 , from what I can tell it'll need nozzle springs, as it's running on one which is stretched ( it requires two either side of the nozzle ) causing it to jam.  I don't know there is anything else wrong with it, springs are available from KWA them selves and other HK retailers like Rainbow 8 etc, this is the part needed : https://www.rainbow8.com/collections/ksc-cz75-parts/products/cylinder-spring-part-no-505-for-ksc-m93rii-gbb , you don't necessarily  have to buy the part if you can find the right size spring, I've have in the past use a spring from a biro to repair my KSC Skorpion,  apart from that the magazine plate is broken but mag is gas tight and fully functional. Looking for £40 which includes both post and paypal. UK mainland only sale.

Make: KWA
Gun/Model: CZ75
Accessories: None
Condition: Used.
FPS: Stock
Splits/Swaps/Part Exchange: No to all.
Price/Payment: £40 all in.
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