Hello!
Well if you mean a polished system with mag, ammo, bullet control for each weapon and the ability to have wield two different weapons, then no currently this is not possible. It's actually a great suggestion though.
It can be however achieved now with little trickery if you set a dual weapon sprite, increased the ammo and mag count to represent two weapons, added the weapon to shot two bullets and increased the spread. Still this won't help much for different type weapons.