Attaching an entity to a bone.

I want to make it so a weapon when holstered is on the players back and i just cant get it to work, when ever i look up or down the weapon is parented/welded to the player but it still just moves away.
So i need it to be fully attached and stay attached to either the hip bone if its a pistol or the spine if its a larger weapon.


that would work great except for the fact that there’s at least 10 weapons holstered on the player at any given time

Obviously not in his particular mod.