When I export animation object change´s place/location

Hi there, I´ve started working with blender, everything regarding animation and modeling is quite new for me, even names like “mesh”, “vertices”, “faces” are new to me.
I´m having an issue and hopefully someone here can help me. I have a weapon, which I add a stattrak model (object)to it, I positioned the object where I wanted to. When I play the animation in blender everything seems fine, but when I export the same animation, that stattrak object I added change it´s location. I´ve been struggling with this for a quite long and I have no idea what should I do to solve it, so I´m asking here for help.
Thank you.

P.S.- I have attached the file

Attachments

fdx2.zip (3.19 MB)