He would need a very high-capacity mag to deal with that size mob.
Often you only need one round to deal with a mob - if they believe you have more they don’t stick around to be the next. Take out the leader and the rest scatter, it’s practically physics - you need trained, battle-hardened troops to get a different reaction from a group.
Not really.
If momma carries as well: ((17+1) X 2) + (16 X 2) + ((6+1) X 2) + (6 X 2) = 130.
That’s from two fill size, two subcompacts, two mags each.
If you’re driving in a large vehicle, this takes up practically no space and is a pretty light load out.