My QB79 that nervoustrig built. It's not the fanciest or most powerful, but I get such a kick out of the fact that a $100 CO2 gun can compete with guns 10x the price after he does his magic.
prod and a handpump .. no question about it ... thats a tool i need to keep pests under control at my rural place .. yes there are specific times other guns would work better but they are few, most of the time the prod gets the problem taken care of with deadly efficiency .. and its very reliable, had it for years .. im sure at this point it has more kills than any weapon i own, some since i was a kid ..
If it has to be just 1 which would be really hard to do as I love my 177’s I guess it would be my m3 and I’d have to get another barrel. I have a 25-30-22-&177 but i especially like the 25and 22 as I can change back and forth with just hammer and bumper settings with pellets or slugs.
If only one, it would be either my HW44 pistol or my Brocock Atomic XR. I have many guns, but those two I shoot nearly every day whereas the others are weekly at the most.
Huben K1 in .22 or .25 - ready to rock right out of the box - accurate, well built, reliable and the shooter can dial from very low to very high power with a single knob. Oh and semi auto and pretty quiet too! I would not enter a benchrest competition with it, but for virtually everything else it's perfect!