This mod makes your character hold the pistol, Uzi, Tec 9 and Sawn off shotgun with two hands and I also changed most of the damage of the guns to make it a lot more realistic but the accuracy of the guns are lowered, or you will get killed easily or kill people too easily. I disabled the dual wielding system to make the game more realistic too. Yes, and I know it is a disadvantage to walk slower with the guns held in two hands so I increased the damage of the guns. Even the gangsters shoot like professionals now.

*UPDATE*
Weapons balanced. Police does not switch between nightsticks and pistols anymore, while just using the gun to hit you. Damage same to unarmed. There is a bug in the game without this mod where you get 1 star and the police chases you with the bat. When you switch to a gun, he takes out the gun and shoots you. Then when you switch back to a melee weapon, he sometimes holds the nightstick like a pistol. And with this mod, there is no nightstick in the game anymore. When a police dies, there will only be a gun.