Fix weapon for game

I made a weapon for a game with blender. When I drop the weapon in the game the weapon moves like this. How can I fix this? https://youtu.be/PPWyHBLjS-Y?si=DLIu_NX4cpd4V721

v_vortex (1).blend (4.4 MB)

can you tell what it is from?

if you fixed it,can you send it to me?

v_vortex (1).blend (3.5 MB)
i changed the bone and origin position. test and see if works

I tried but it didn’t work, the weapon was still moving and was in the wrong place

so the problem is in the animation, which engine are you using?

Quake 3 engine

can you tell what it is from?

i never used quake before, apart from gaming, so i can only think maybe is the animation of the character that you parent the weapon.Maybe switch the bones?