Worth noting that Western produces the Sidewinder in 30, which is essentially the same mechanics as Huben. I have no idea if there’s actually a relationship between those companies but if there is, perhaps it precludes Huben from doing a 30?
At 350b fill capability and having an 8in barrel with the capability to put out a shot at 80+fpe, the GK1 operates at the limit of airgun physics. I don’t see how anything will surpass it without increasing size or running on Helium. However, what’s really remarkable about the GK1 is its capability to shoot really flat strings with no reg, using the hammerless system to buffer the variability in pellet speed that you get from a conventional unregulated airgun. Then there’s the crazy accuracy, on a par with many high end PCP rifles. It’s absolutely the biggest leap forward in the PCP world in the last few years. I fully expected it to be a ticking time bomb due to its power capability and operational complexity, but mine has had absolutely no issues shooting through >5000 rounds. Plus, it’s a bargain. Knowing what I know now, I’d still be happy if I’d paid $2k for it instead of 1200.
I’ve spent way more on pellets on it than I have for any other gun. It’s just so much fun to shoot that I often grab it even if it’s not the most appropriate tool for the job!