M4A1 Tech Zombie

v1.1.0·Updated 2026-03-05

A cursed dual-barrel AR or a bite from zombies, that's a difficult choice. (COD Online Weapon)

Screenshots 2 screenshots

About this mod Machine translation

R.I.P Call of Duty: Online (CODOL)

Heavily modified from M4A1, it retains M4A1 lower receiver and adopts an advanced upper receiver set with a piston system, which improves the degree of modularity and ergonomics.

Use this heavily modified classic M4A1 variant to deal with zombie hordes. Featuring the A1 lower receiver and an advanced gas-operated upper receiver assembly, along with improved ergonomics, this is a near-perfect all-around weapon.

So... Yeah, the original "M4A1 Tech" is actually a M4A1 with HK416 upper, using M27 IAR handling data from BO2. But now it somehow has two barrels. Don't ask me how, it's classic Chinese COD black magic. (and yes it's very clearly that this skin is inspired by the HVK-30 from BO3)

Can be found in Firearms/CODOnline.

Features

  • A cursed AR pattern? rifle
  • 30-round and 45-round STANAG magazine
  • PBR converted and upscaled textures
  • Foldable sights and silencer(or should I say, silencers)
  • Unique "Alienation" variant with blue finish decorated with skulls, toggle the button on the stock area to switch

Known Issues and Limitations

  • Goofy ahh PBR converter makes it very shiny and reflective in certain environments
  • Originally I want it to use 2 barrels at once when semi-auto but I couldn't figure out
  • Bad quality interior, model comes from an old non-VR game so😢
  • Textures might not be perfect, if you know any better methods to upscale textures please tell me

I Asked Myself These Questions

It is hard to aim with the sights

  • This weapon is ported from CODOL, where players can even aim without rear sights. So bear with it😢.

It's really ugly and buggy

  • Sorry, I'm not good at modding. If you have any suggestions, please tell me. (Discord: Nicola_Niko666, I'm in UTC+8 timezone so probably won't respond to messages in time)

I want more

  • I'll do my best.🫡

Credits

  • Activision and Tencent for making Call of Duty: Online
  • Yan mentally retarded has no spring for the image
  • Okkim for the CycleMuzzles script (Bag Of Scripts)
  • Everybody in H3VR community
  • You

Install & use Install: BepInEx plugin

  1. The archive from playbuff is the mod itself — usually a BepInEx plugin (a .dll or a plugin folder once unzipped).
  2. Recommended: use a community mod manager (such as r2modman) — pick this game, import the mod, and the manager sets up BepInEx and its dependencies for you.
  3. Manual route: install the BepInEx loader in the game folder, then drop the unzipped .dll or plugin folder into BepInEx/plugins/.
  4. Launch the game — the BepInEx console logs every plugin it loads; seeing this mod in the log means it is installed.

Mods with listed dependencies need those installed too, or they will not load. Options are usually changed in-game or in the plugin's config file.

Dependencies

Install these first, or the mod will not work:

devyndamonster-OtherLoadercityrobo-OpenScripts2Okkim-Bag_Of_Scripts

File & checksum

Filename
M4A1_Tech_Zombie-1.1.0.zip
File size
28.5 MiB