Elaborate? What is this Baron Pistol and in what way would you like me to upgrade it?

Upgrade its impact and its a pistol dropped by a sargon god and a sargon is an alien race that is run by religious beliefs

Okay, for impact I can just upgrade rounds to be of higher caliber, and edit the pistols chambering to accommodate that as well. I can also fit the rounds with hard tipped ammunition. Will make the gun a tad bit heavier and slower, but will have one hell of a shot. It's not made for armour piercing, but it can sure as hell batter heavy armour up.