Hello, I am trying to port models from Modern Warfare 2 to CSGO with my friend but we have a problem in Blender. We are trying to port viewmodel, but the problem is that I have 2 models with 2 separate skeletons and separate animations for each skeleton (from one .seanim file). I need to somehow export it as a one model with one animation (one reference and one anim file instead of 2 reference and 2 anims for each reference) so it could work in CSGO. Do you think you could help me with this problem ? I can provide you my .blend file, we managed to get it fully working but I simply cannot export it in 2 files.

I've already tried CTRL + J but it gets broken and my Blender knowledge is... meh.