WeaponFireCallback/keyvalues/scripts/weapons/mp_weapon_sniper.txt

WeaponData
{
	"OnWeaponPrimaryAttack"							"WeaponFireCallbacks_OnWeaponPrimaryAttack_weapon_sniper"
	"OnWeaponNpcPrimaryAttack"						"WeaponFireCallbacks_OnWeaponNpcPrimaryAttack_weapon_sniper"
}