The 5KU TM AKM sport kit also fits with the B-33

There's nothing internal that needs replaced, and it's compatible with real AK parts if you can get those.   Wiitech B33 railed dust covers for the TM AK GBB fit. (Not the AEG).    The stock you can shim with tape until it's toight like a toiger

Hello!  I'm new to airsoft and recently bought a spring M82A1 from snow wolf for large polygons. After playing one game I realized that it is very difficult to cock the 190 spring.  Now I’m thinking about converting my rifle from spring to HPA, but I don’t quite understand how to choose the right spare parts for this task, can someone help me with the selection of spare parts? Thanks in advance!