UPDATE. PRICE DROP. There’s a leak somewhere inside the gun. It’s very minor and goes away a few seconds after plugging in air. But I’m not familiar with polar star so I’ll leave it to you and reduce the price. Very unique gun here, you will probably never see one again like this. The original gearbox is not standard v3, so dropping in the Polarstar Fusion Engine was quite the task. Externally, this gun is on the same level of quality as a real Chinese Type 56. Real Sword is revered for their externals. True firearms grade stuff, with airsoft internals. Only thing missing is the rear sight, any real ak rear sight will fit. Includes the leaf spring Includes 1 fcu battery, orange tip, non threaded tip, threaded tip, and a few random spare parts. Mag compatibility can be tricky with these even in stock form. You'll likely have to file down the latches on your mags for them to click in. Super simple stuff, just something to be aware of. Absolutely not interested in trading. If you ask about trades I'll know you didn't read this far and I'll just ignore you. Sorry, I have my time wasted way too much on this app. I'm happy to answer questions and provide more photos to serious buyers.