@pedro: you definitely need to merge your vertices. as i can see from the model's in-engine shading, all faces aren't connected which produces the flat-shading look. this is a known problem for importing files, esp. 3ds and obj files, int MED. How to sove: 1)import your model in MED 2)go to vertices selection mode 3)tools>mesh tester (may take a lil while) 4)you get a message box about "closed"(good) and "open"(bad) meshes. 5)klick OK and now "merge" (toolbar>right)
ps: very nice model., congrats. the ammo skins are beautiful as well. impressive!