This is an pack of Realistic Weapons, for GTA IV,this is 1.0 Pack, the Hud is 
diferent for weapons, (Example: AK-47 have diferent HUD Model of M4) sometimes
is appear strange but, what is inportant is the weapons.

How to install: 

1- Open Open IV or Spark IV

2- Go to pc/models/weapons.img

3- Open weapons.img

4- Actvate the edit Mode

5- And pickup all (if you want) the files and paste it on the folder
on the Open IV.

6- Open the game
Enjoy!

(Remember! This is the 1.0 version, some bugs still appear!)