How''d you get ten dice if you don't mind me asking since i doubt your mages agility was 6.
This was 4th edition, so Smartlink. I had 8 dice for the pistol, 10 for the shotgun, 4 agility (str, edge and the mental one I didn't need for drain were my weak stats I think, it's been a long time).
You make it sound like the average former civilian runner in the 2070s can't buy an MP and go to a gun range to justify having the Automatics skill. Why do you think people IRL today go for semiautomatic pistols or more, ranging from gang members to civilians wanting a home defense or carried sidearm? The answer is: more shots are typically better in life-or-death situations.
Now, obviously there's a difference since I don't think MPs are generally civilian legal today (correct me if I'm wrong; I mean, a certain particular group of people openly carry ARs into Target these days just because they can, so maybe carrying an MP isn't out of the question), but the point still bears out in a more consumerist world with generally fewer restrictions like the 2070s.
They can have it, but they will have to explain where they got it from. Also, me and my group live in Europe, where the weapon's laws are much more stringent and most people never handle a gun in their entire life. This gets reflected in the way we do shadowrun.
Like I said, what gun you want to give him depends on concept and I would like to add, setting. If your runners are for instance in Brittain, they probably have at maximum heavy pistols, if you are in Lagos, you don't want to be seen without automatic weapons.