The M6 is OOP. There were reliabiltiy issues with some bulged chambers in .22 Hornet and extraction was always an issue. The M6 and AR7 are as much 'neato-keeno' as practicality in a potential buyer's eye. I've owned both, and yes, they are 'neato-keeno.'Available M6s are quickly becoming vastly overpriced due to the feeding frenzy. Please remember these were developed for military aviation, specificaly SAC flying over the ARCTIC. Compactness and wieght took precedent over all else for a ptarmigan and snowshoe rabbit gun easilly replaced by a roll of snarewire. personally, I got to shoot a Luftwaffe survival drilling once. With a 9.3x72 ( equal to a .375 H&H) over two 12 guage tubes it sort of made everything else pale in comparison.