Item perks

All weapons have 5 perks that unlock when you are proficient enough with the corresponding weapon skill. Small Guns, Big Guns, Energy Weapons and Hand-to-Hand Combat weapons unlock new perks at skill levels 150, 175, 200, 225 and 250. Throwing weapons, Sneak weapons and items such as First aid kits and Doctor bags unlock perks at skill levels 100, 125, 150, 175 and 200.

Different weapons and items unlock different perks. Here's the list of perks that can be unlocked: