Here is my lowpoly generic military jet concept.All objects are jointed except weapons and weapon launchers.If you use subdivision modifiers you will have your 3d model sub-d ready.Also you can use it for 3d printing if you use my STL file included in zip file
STL file
verts:413445
polys:413307
blend lowpoly file
verts: 7212
polys: 7215