DarkRP swep modding..

[Knut]

Okay so I've been getting into modding the sweps that come with darkrp, considering I actually use them on the server and would want to make them better..
Just one question..
(Here's the code by the way)

SWEP.Primary.Sound = Sound("Weapon_mac10.Single")
SWEP.Primary.Recoil = -0.4
SWEP.Primary.Damage = 30
SWEP.Primary.NumShots = 1
SWEP.Primary.Cone = 0.02
SWEP.Primary.ClipSize = 30
SWEP.Primary.Delay = 0.05
SWEP.Primary.DefaultClip = 75
SWEP.Primary.Automatic = true
SWEP.Primary.Ammo = "smg1"

..What the hell does SWEP.Primary.Cone do?

All help will be greatly appreciated :D

[editline]10th December 2010[/editline]

I'm also wondering on how to turn up the accuracy on the weapon, since when I turned down SWEP.Primary.Cone I couldn't walk around lol.. Any help on this will be appreciated just as much ^^