I frequently teach people how to shoot, and one of the cardinal rules is "muzzle discipline"; imagine a red laser beam coming out of the gun barrel, and make sure that in moving the gun from here to there you *never* pass the muzzle across anyone whom you do not intend to kill.
My first thought was that while swinging the sword (parry, thrust, swing, etc), you would "laser" everybody and his brother.
However, this is virtual, so no real concern for accidental friendly fire incidents.
So, let your imagination take wing!
By the way, I've seen pics of real pistols with (shorter) blades, usually made in the pirate era. Being single-shot and relatively slow to reload, the blade wasn't a bad idea as a backup.
The long magazine which protrudes way out the bottom actually exists; those are usually made for what are generically called "camp carbines", which are short rifles that take pistol ammo.
But several pistols can happily accept the carbine magazines, albeit they will stick out the bottom.
I have several such magazines which fit the Israeli
Jericho and
Barak pistols; they hold 30 rounds of NATO 9mm.
In California and New York, the
politicians are protected by standard full capacity magazines; the
working folk may only have ten rounds and that only if they get permission. In Ohio, I can carry whatever capacity mag I wish. It is the long blade which would be illegal to carry in most US states, ironically.