Mister Iggy!
I am assuming the mdl is precached on the script.
Even if it is; a line of this sort is required to see it in 3rd person.
Code:
new Float:frame = entity_get_float(weapon_ent[id],EV_FL_fuser1) + 2.0
Older non-ham method.
Might be of assistance.
Best of luck.
PS: Miss your little army helmet avatar!!