Outfit Studio: Need help moving parts

[frostxfire]

Hi, I want to put together a weapon to place it on an outfit (like a holstered weapon) and I combined all the mesh parts in outfit studio but when I try to move them to position the weapon on the body, some of the mesh parts are moving in different directions than the others when they are all selected. Can anyone help me with that? I'm quite certain I'm doing something wrong because I don't know how to properly use the Outfit Studio, I simply tried to copy the steps from some tutorials I found but nothing that specifically instruct what I'm trying to do and now I'm lost.

[kziitd]

Unify the value of XYZ in "origin" in the "coordinates" of all components to 0

[frostxfire]

Oh, that helped, thank you.