Well for the air tank, you have a very small o.d. barrel inside of a 1" O.D. I am guessing Ti tube that is 24-26" long. I'm not going to do the math, but that"s a bit of air. As for the bullet the Hornady 35 grain NT has a G1 of .177. I am a little surprised by the nastiness of a few on this forum and some of the comments of several members, especially knowing that he actually does some pretty cool stuff with airguns. I can't say I would have been as polite in my response as he was, and if any of us got called B.S. on us for something we actually did and showed people, I doubt it would be taken kindly by anyone here. I have seen 2-3 airguns with the tube around the barrel, assuming this is what he is doing. I will get off my soapbox now.
When everything is patented and in dry towels ,all details will knowen with the launch i think...i would do the same to keep my work protected for as long as possible.Those who have top produkts as you can see at their booster,who develops somthing like that you can also trust the development of an rifle with these parameters
The rifle is so quiet because it has a unique valve system that is probably the best in the world, according to the information I have on other rifles. I do not know how good is Huben airgun, but about result with great power is going to be good too . This valve device ensures low noise at shot and it is possible to achieve great power and the number of shots even for a small volume of airtube.