DARK RP Customizing M9K Lua doesn't work?

As the title states, I’ve tried to edit M9K weapons via lua files,
I’ve tried to change to amount of damage that a weapon does, and also how much ammo it can hold, and which ammo you have to buy for it.

Yet, it never works, here is the code directly from my server/gamemodes/darkrp/entities/lua/weapons/m9k_m416


SWEP.Primary.RPM			= 300			-- This is in Rounds Per Minute
SWEP.Primary.ClipSize			= 25		-- Size of a clip
SWEP.Primary.DefaultClip		= 25		-- Bullets you start with
SWEP.Primary.KickUp				= 0.4		-- Maximum up recoil (rise)
SWEP.Primary.KickDown			= 0.4		-- Maximum down recoil (skeet)
SWEP.Primary.KickHorizontal		= 0.6		-- Maximum up recoil (stock)
SWEP.Primary.Automatic			= true		-- Automatic = true; Semi Auto = false
SWEP.CanBeSilenced		= true
SWEP.Primary.Ammo			= "smg1"			-- pistol, 357, smg1, ar2, buckshot, slam, SniperPenetratedRound, AirboatGun

and it doesn’t seem to work! I don’t know why… anyone know?