MP45A3

v1.0.0·Updated 2025-12-20

A cursed MP5A3 but chambered in.45ACP that uses Grease Gun mags oh god

About this mod Author’s original text

MP45A3.45 ACP SMG

One of the more oddball conversions based on Ian's discovery from Forgotten Weapons, supposedly a conversion that was seen/based on some Pakistani small-arms workshops: an MP5A3 receiver and fore-end adapted to fire.45 ACP fed from M3 “Grease Gun” 30-round stick magazines.

The conversion probably would require the magwell to be rework to adjust to fit the M3 Grease gun magazine, as well as changing the barrel. The heavier.45 ACP definitely makes it fire a tad slower and more heavier recoil, but that's not to say it won't be fun firing a.45 ACP out of a roller-delayed blowback submachine gun.

Every aspect of the SMG is similar to vanilla, it takes muzzle devices, has rail adapters and the ability to change fore-end.

Features

  • A weird conversion of the venerable MP5 to fire.45 ACP!
  • Uses vanilla M3 Grease Gun magazines
  • Takes on vanilla style MP5 attachment options
  • Can be found in Firearms > SMG

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-OpenScripts2

File & checksum

Filename
MP45A3-1.0.0.zip
File size
14.0 MiB