WeaponData

The WeaponData which describes various attributes about a weapon can be found in weapon_[weapon name].txt in the scripts folder.

Here is a list of all attributes and their functions (comments taken from weapon_parse.h), not all attributes have to be specified:

"printname"		// Name for showing in HUD, etc.
"viewmodel"		// View model of this weapon
"playermodel"		// Model of this weapon seen carried by the player
"anim_prefix"		// Prefix of the animations that should be used by the player carrying this weapon

"bucket"		// inventory slot.
"bucket_position"	// position in the inventory slot.

"clip_size"		// max primary clip size (-1 if no clip)
"clip2_size"		// max secondary clip size (-1 if no clip)
"primary_ammo"		// "primary" ammo type	
"secondary_ammo"	// "secondary" ammo type


"default_clip"		// amount of primary ammo in the gun when it's created
"default_clip2"	// amount of secondary ammo in the gun when it's created

"weight"		// this value used to determine this weapon's importance in autoselection.
"flags"		// miscellaneous weapon flags

Other possible data which can be nested inside WeaponData is SoundData and TextureData:

SoundData
{

	"reload"		"Weapon_Pistol.Reload"
	"reload_npc"		"Weapon_Pistol.NPC_Reload"
	"empty"			"Weapon_Pistol.Empty"
	"single_shot"		"Weapon_Pistol.Single"
	"single_shot_npc"	"Weapon_Pistol.NPC_Single"
	"special1"		"Weapon_Pistol.Special1"
	"special2"		"Weapon_Pistol.Special2"
	"burst"			"Weapon_Pistol.Burst"
}

TextureData
{
	"weapon"
	{
		"font"		"WeaponIcons"
		"character"	"b"
	}

	"weapon_s"
	{	
		"font"		"WeaponIconsSelected"
		"character"	"b"
	}

	"ammo"
	{
		"font"		"WeaponIcons"
		"character"	"s"
	}

	"crosshair"
	{
		"font"		"Crosshairs"
		"character"	"Q"
	}

	"autoaim"
	{
		"file"		"sprites/crosshairs"
		"x"		"0"
		"y"		"48"
		"width"		"24"
		"height"	"24"
	}
}

Here's an example of weapon_shotgun.txt:

// Shotgun

WeaponData
{
	// Weapon data is loaded by both the Game and Client DLLs.
	"printname"		"#HL2_Shotgun"
	"viewmodel"		"models/weapons/v_shotgun.mdl"
	"playermodel"		"models/weapons/w_shotgun.mdl"
	"anim_prefix"		"shotgun"

	"bucket"		"3"
	"bucket_position"	"0"

	"clip_size"		"6"
	"primary_ammo"		"Buckshot"
	"secondary_ammo"	"None"

	"weight"		"4"
	"item_flags"		"0"

	// Sounds for the weapon. There is a max of 16 sounds per category (i.e. max 16 "single_shot" sounds)
	SoundData
	{

		"empty"			"Weapon_Shotgun.Empty"
		"reload"		"Weapon_Shotgun.Reload"
		"special1"		"Weapon_Shotgun.Special1"
		"single_shot"		"Weapon_Shotgun.Single"
		"double_shot"		"Weapon_Shotgun.Double"
		// NPC WEAPON SOUNDS
		"reload_npc"		"Weapon_Shotgun.NPC_Reload"
		"single_shot_npc"	"Weapon_Shotgun.NPC_Single"
	}

	// Weapon Sprite data is loaded by the Client DLL.
	TextureData
	{
		"weapon"
		{
				"font"		"WeaponIcons"
				"character"	"b"
		}
		"weapon_s"
		{	
				"font"		"WeaponIconsSelected"
				"character"	"b"
		}
		"ammo"
		{
				"font"		"WeaponIcons"
				"character"	"s"
		}
		"crosshair"
		{
				"font"		"Crosshairs"
				"character"	"Q"
		}
		"autoaim"
		{
				"file"		"sprites/crosshairs"
				"x"		"0"
				"y"		"48"
				"width"		"24"
				"height"	"24"
		}
	}
}