Day one with a Huben K1 .25 caliber

Came in a typical rice cardboard box with a Styrofoam insert. No plastic bag, no desiccant. Nothing on or in the box to ID it as the latest generation other than one simple .05 on an end flap. I assume it's a 5th generation. First, clean the barrel. Patch came out black, a couple gray and then brown patches. Lots of brown patches Rust or grease? Put my Aztec scope on it and no limit mounts, bottomed out in the saddles. First shot (JSB 25 gr) was NOT neighbor friendly at factory 150 bar on the regulator gauge and 1,100 fps! There is no tank gauge and my YH compressor gauge says it pumped it up to 5,000 psi...I think the YH gauge is a liar! Since it was raining and probably nobody outside,took a few more shots and with a dozen clicks was ballpark at 50 yards. 5 shot group was horrible. 33 gr JSB's were just as bad. JSB's were snug in the magazine. Very easy to adjust the velocity down to a more quiet 940 fps. Switched to the 33 gr Varmintknockers and a vast improvement. Slugs were loose in the magazine and the nose would rattle into the barrel and stop magazine rotation in loading. Muzzle inclined and no more hang ups. Hold over 20 and the groups were impressive for a new gun on my 123 yard pig. Dropped back to my 23 yard target and it's dead on in the cross hairs with no hold over or under. Functioned flawlessly in 120 shots or so. Fit and finish seems to be as good as any. Last shots were extreme spread of 9.The built in suppressor has air strippers separated by what looks like sintered aluminum washers. I don't think it works very well. I need to get the tank gauge option and a suppressor of some sort. MP 8 cavity mould should be here shortly. The fill probe is a damned odd size. Bigger than my Ataman and smaller then my FX. The FX foster on my hose, of course fits the FX rifles and the Ataman probe fits the FX Foster female...but the Huben probe is loose on the FX female foster and I have to wiggle rotate it to get it to seal up.

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3 shots,123 yards

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There is no way to de cock this rifle...it is ALWAYS ready to fire if the safety is off. 
A fully loaded, non removable magazine will fire only one shot if the magazine latch is not lowered after filling it...it just puffs blanks until the magazine is rotated one notch to advance to the next pellet and then the latch lowered.
When the mag runs dry....it just puffs blanks...so I marked the mag for the last shot with a drilled dimple filled with red paint :)
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DjBriez, have the one coming with the male foster on the front and the gauge on the side. That will end the oddball Huben fill probe that doesn't fit my FX female foster very well. Took a quick 9 shots with JSB's 50 gr at 23 yards today. Nothing to brag about...but good enuf for my purple Martin house raiders (sparrows and starlings). Recent video stated that it takes 2 to 10 shots after adjusting the reg........for it to settle in. Waiting for the bullet mould to get here...then i will get
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serious.