Was looking on Chiappas home page for some specs on my 12g and came across some interesting firearms, first one was the Little Badger - single shot .22lr or.22mag 16.5" barrel whole gun folds down to be 16.5" and weighs a massive 1.3kg
Next one really caught me eye, X-Calibre, a break barrel combination gun 12g over a .22lr, bizarre stock but looks practical, but the interesting part is the little bag that comes with it, comes with adaptors to drop into the 12g smoothbore, these adaptors are stumpy 9" barrels in varying calibres from 9mm, 357mag, 44mag, 410/45long colt, even in .223 and .308.
I imagine accuracy would be a little lacking but versatile 8+ varied cals all in a super light weight package, I'm in the process of sourcing/pricing and checking registration requirements at present will keep posted. If any others interested simply look at YouTube or google it and go the chiappa.com blah blah blah, interesting little guns worth a look