Here we have for sale is my Specna Arms tank rifle. I bought this on presumption that it was a G&P as at one point G&P were the only ones that made this rifle. This rifle was purchased from zeroone airsoft and it has been tested on their range. It runs at 330 fps consistently without the hop on and 380 with the hop on. So I would suggest a spring change it has the quick change spring gearbox. I’m happy to sell it with postage, but not buyers fees as I will be loosing out on the price. No box unfortunately