Damage per hit (That is already editable though)
Accuracy
Price
Ratio of fire
Weight
Maximum ammo
Ammo on pickup
Clip size
Projectile speed
Projectile aiming mode (The grenade launcher throws grenades that explode once they have traveled the distance of the player to the crosshair at the time of shooting, the rocket launcher ignores the distance in a way)
Projectile distance limit (The rockets of the rocket launcher explodes after a set amount of time if they didn't collide with something before)
Projectile bounciness (Whether the projectiles bounce or not)
Explosion range and power (For mines, for example)
Projectile explosion range and power (Everything that throws projectiles that explode).
Range of action (When you throw a molotov and explodes and everything around gets on fire? Radius of the circle of fire)
Time limit of action (Smoke grenades stop throwing smoke in the air after some time)
Whether it can appear on the buy menu (mp_buymenu, also you cannot put special items like the stealth armor on it)
Description of the gun in the buy menu
Whether it can be held on the inventory