Flechette rifle multiplayer

How? I'm using "SV_Consistency 0"
I took the asw_weapon_railgun.cfg and made it like this:

// Alien Swarm Coil Assisted Rail Rifle

WeaponData
{
// Weapon data is loaded by both the Game and Client DLLs.
"printname" "#asw_weapon_railgun"
"viewmodel" "models/weapons/railgun/railgun.mdl"
"playermodel" "models/weapons/railgun/railgun.mdl"
"anim_prefix" "ar2"
"bucket" "0"
"bucket_position" "0"

"clip_size" "9999999999999999999999999999"
"default_clip" "9999999999999999999999999999"

"clip2_size" "-1"
"default_clip2" "-1"

"primary_ammo" "ASW_F"
"secondary_ammo" "None"

"weight" "5"
"item_flags" "0"

// asw properties
"reload_time" "0.0001"
"base_damage" "100"
"fire_rate" "0.01"
"equipicon" "swarm/EquipIcons/EquipRailgun"
"equiplongname" "Flechette Launcher"
"equipdescription1" "Fires self-propelled magnesium tipped flechettes with built in auto-targeting systems."
"attributestext" "#asw_weapon_flechette_attributes"

// flinching
"FlinchChance" "0.20"
"StoppingPowerFlinchBonus" "0.10"

// which ammo elements this weapon should display on the hud
"ShowBulletsOnHUD" "1"
"ShowClipsOnHUD" "1"
"ShowGrenadesOnHUD" "0"

// Sounds for the weapon. There is a max of 16 sounds per category (i.e. max 16 "single_shot" sounds)
SoundData
{
"empty" "ASW_Weapon.Empty"
"special3" "ASW_Weapon.Reload3" //switch weapon

"single_shot" "ASW_Hornet_Barrage.FireFP" // sound for locally controlled marine
"single_shot_npc" "ASW_Hornet_Barrage.Fire" // sound for other marines
}
}

its alittle edited, it does make the hornet barrage sound, but its still shooting railgun (graphic) bullets. Anyone know how to change it to shoot barrage bullets like the hornet/flechette is supposed to?

edit: i used Alien Swarm bypasser for a day, it worked, used it on free account, gonna wait awhile to see if it gets banned.

Ran Alien Swarm, Bypasser, and STEAM through sandboxie, everything worked, all cvars were unlocked in multiplayer, even without turning sv_cheats 1 on achievements yay.