All of you should see Annette Birkin shotted her G-Husband in CUTSCENES right ?

Her gun called Anti-Virus gun and it's ammo called Anti-Virus ammo in game files. Also both files have their own scripts for gameplay.

BUT unfortunately, It's not actual weapon that can use (swap or replace any weapon will crash and can't run the game). Maybe can be used only in DEBUG MODE or something. some modders that have skills can ported Antivirus gun Model & texture for use to.

Credits from : residentevilmodding.boards.net

I talked about these files.
wp4900 - Annette's Anti-Virus gun
wp4901 - Annette's Anti-Virus gun (Ammo)

I CAN use that Anti-Virus ammo damage flag. so this mod just change DAMAGE TYPE of Normal Bullet and EX-Bullet to Anti-Virus type.

affect these ammos that not have Warhead projectiles:
any Handgun Ammo + any Ex-Handgun Ammo
any Shotgun Shells
any Magnum ammo
any Submachine gun ammo
MINIGUN ammo

Now, Anti-Virus Damage type details :

no changing in damage dealt of each guns.

Ignore Any Bulletproof :: you can shotted through armor-zombies on any parts. ammo scripted to cause damage on UNIT itself. damage is depend on which part got hit.

Destroys All Ivy's Weakpoints in 1-shot :: ammo scripted to ALSO damage WEAKPOINT of UNIT, and all weakpoint HP is lower than SMG bullets that lowest damage in the game. This mean Instant-kill for Ivys.

can popped Mr.X hat off but thats it! :: Mr.X's coat well-known for immune to Element-type damage (Elec-Fire-Acid). He can stagged by warhead projectiles. but that because of grenade round's splash or Rocket Splash. NOT effects. So Anti-Virus effect will be immuned too. BEWARE !!.

no BLOODSHED :: for REALISTIC PLAYERS or bloodlust player. this mod is not for you. Effects in Annette's CUTSCENES is just a show!! no ACID, no smoke, no bloods, no moaning pains.

thats I want to say. Enjoy this DEBUG ammo.