
I wanna have or see a mod that u can move attachment like real attachments i wanna make cool/funny looking guns

Do you mean like Ground Branch or Tarkov?
Where you can manually place the position of gadget anywhere along the Picatinny Rail (Ground Branch), or any compatible slot (Tarkov)?
Idk how Ground Branch does it, but last I checked a Tarkov weapon, their system was fairly similar to Payday 2's in having rigged every single attachment point available to the gun.
So if you'd want vanilla Payday 2 weapons to mount a gadget position to each handguard, someone would need to be insane enough to rig every single applicable attachment point you'd want for customization. Optics have an additional layer of annoyance when having to ensure every optic is zeroed correctly to whatever other optic attachment points you define.
considering we're struggling to find a way to fix weapon viewmodels in-game for custom weapons alone without messing up every other weapon viewmodel i'd say we're a couple milestones away from that.
if at all.
What do you mean "fix weapon viewmodels in-game for custom weapons"? What's wrong with them?
@insomnia
old mods that need PVM or something like that and then if you adjust it in-game you break it for the vanilla weapon.