How to disable inertia drag

My character is a physical object (physics is turn on) player control character by PhysicsHandle and when character moving, it simply change target location of the character, but i have a problem, if i increes mass of weapon, my weapon starting to drag my character by inertia, how to disable this inertia drag?

Video:

(Weapon mass on video equal 10 000, on mass equal 300 this didn’t happen)

This my character and how it move: