Each weapon is upgraded with different improvements, and you can get these upgrades by using the weapon in a way that makes it stand out. For example, you can score three or even five consecutive kills using a particular weapon and your knowledge of the weapon will increase. When you reach the top of the experience meter for a weapon and you can gain an upgrade to the weapon. This could include an satchel bag for carrying additional weapons (the next upgrade will be a bandolier with grenades) as well as hair triggers that is used with the pistol's automatic permitting you to fire more quickly and a pistol grip for your Thompson submachine gun, which improves the accuracy of your gun; and many other.
https://www.mmoexp.com/Wow-cata-classic/Gold.html
![image](https://waqarmartsocial.nyc3.digitaloceanspaces.com/upload/photos/2024/06/vI2cgFOop7gkij5EyQX5_28_3a38d88fb0d8faab0318c35748a16c64_image.png)