I need the support of someone who has experience in weapon models, and export to gbx model and collision model, i have a modified weapons, but did not really understand the tutorials on how to export, also do not know if they need something, gives credits for this are for my project, here is the link, please help and send me and gbx model and shaders, bitmaps are already in the file

http://www.mediafire.com/?7cahtlm2tuuhpx0

can the original files for these weapons not be edited to suit yours?
what i mean is have you edited the shape of the weapons or anything?