The title premise could apply to 45' (45-prime) too. Even the 1873 Colt had 6 chambers, not to mention the 1911 Colt M1A1 semiauto with even more capacity. There's enough 'solution' for every 'deserving' body.
Not seeing any mention of a long-gun in your 2nd post to which I referred....just sayin'. FWIW, I have an AR15 civilian semi-auto long gun in my personal armory.
EDIT: now I have to admit I'm not reading properly AGAIN....I was seeing M1911A1 instead of what you were writing! I still remember my M1 thumb from initial qualification at the rifle range in boot camp...although the M1A1 didn't come into being until 1941.
Now I must admit to misremembering (even after "re-reading" that second post) and confounding AR-15 with 1911 Colt M1A1 semiauto. Mea culpa. Blame it on "purple rain".
FWIW, I have an AR15 civilian semi-auto long gun in my personal armory. 
