Well fear not!
This pack makes the weapon textures for the Hazen n Stuff addon match the usual style and resolution of Minecraft. It keeps the fully detailed 3d model when you are holding the item in your hand, but in every other context the weapons will use a clean 2D sprite. Now your hotbar won't have a sore thumb sticking out of it if you want to use a high-tier weapon!
Credits to thegr8grape_ and Waffy for inspiring me to make this and of course thanks to Hazentouvel and Iron431 for making the mods this is for!
I might make a 1.21 version if there is enough demand.