Weapon Specialist

Pistol Whipped  is an achievement in  SAS: Zombie Assault 4. It is achieved by augmenting 1,000 times across all weapons. When achieved, the player gets 200 awesome points.

Tactics

 * If you are have an assault character, you can use Gun Mod Expert to reduce the cost of augmenting guns.
 * Otherwise, try farming maps like Zombie Pods and Survivors for cash for augmenting weapons.