ALL CREDIT GOES TO MARCOSJOESTAR
I merely ported this to 1.21.1 to use for my modpack, Woven: Steampunkd (coming soon)

This mod adds ways to craft and automate the guns, ammo and attachments from Create Amorer into an immersive Create experience.
Now the recipes of the guns are more realistic and the ammo can be manufactured in mass!
Only the Create Armorer Weapons are meant to be used, since they're the most fit for a create playthrough.
New Gun Parts!
New items were added to serve as intermediary steps when crafting the weapons.
Gun Barrel

Trigger Mechanism

Firing mechanism

New Gun Recipes!
Since the TaCZ weapons are really powerfull compared to your usual minecraft and create weaponry, the recipes have been balanced using the new gun parts. Now you will need to have a components like precision mechanisms and mechanical crafters to craft them.
New "Torque" Revolver Recipe

New "Stress" Auto Pistol recipe

New "Clockwork" Sniper recipe

New "Crane" Assault Rifle recipe

New "Stone" Shotgun recipe

New "Bearing" Shotgun recipe

New "Crank" SMG recipe

New "Flywheel" Machine Gun recipe

New "Atomic Breaker" Melee Weapon recipe

New "Wrench" Melee Weapon recipe

New Gun Attachment Recipes!
A gun isn't complete without a few attachments, so more recipes have been added to make them.














New Ammo Casings!
The ammo casings are made by sawing brass plates. You can put a filter with the casing of your choice using JEI to make it cut the sheets into that type.

New Fluids!
Gunpowder can now be stored in tanks as fluids and used in the different recipes. If you have Create Big Cannons installed, you can also store Nitropowder, which is more efficient than gunpowder at making primers.

New Ammo Recipes!
To craft the ammo, primers are needed. These are made by injecting gunpowder or nitropowder into andesite casings.


Now that you have the primers, you can insert them into the casings and filll them up with gunpowder to craft you ammo type of choice.

You need to have brass for creating guns and manufacturing ammo so be sure to have reached that technology level when trying to make your new gun factories.
Apart from that, the process requires a large amount of andesite alloy, since it requires one alloy for every primer so be sure to at least have that process automated.