Adan

So far is good but the tuning was more complex than I expected sometimes makes dry fires, I used an extended inner barrel (madbull) and it's very precise on 30-40 meters so even using a scope is handy.

To follow up my project of converting HPA into an ARES G36, To answer my own question, yes it is possible although it's difficult to find Polarstar parts world wide, and long shipping times. I found the F2 engine on powair6.com and the nozzle (had to purchase nozzle and engine separately),the switchboard and reinforced hose from Amped airsoft, the FCU from Easy Airsoft. It required a few modifications, I needed to file a tiny bit (I reckon 0.1mm) of the F2 because it was blocking the trigger mechanism, also there's a cable that has to be soldered into the switch. To plug the FCU I required to put a mini-tamiya plug for the LiPo battery. So far looks good, I also upgraded the inner barrel from a 285mm into a 455mm 6.01mm madbull, with a madbull shark hop up rubber. The inner barrel is longer than the outer barrel so I included a silencer to cover the inner.

Hi, Thanks for your detailed question What I'm trying to figure it out is which gearbox do I have, I'm not 100% sure if it's a V3. Someone told me it will fit an F2 V3/AK but same, not sure about this. Usually the options are not very clear like on that Evike screenshot.

Hi everybody thanks for reading my post. I would like to fit an HPA engine into my UMAREX G36K, I think is built by ARES . I can't figure it out which gearbox it has, I've search on the Polastar and other manufacturer sites, also EVIKE or other vendors but it's not so clear to me as they don't mention specifically this rifle. How can find which one is the best fit? Any suggestions for a really good engine? I've been reading some posts and some people had to adapt the kit into the gearbox.