at the personal stats list he says my preferd weapon is the mp-40 but i didn't used it since i read it was my prefered weapon because i wanted to chance that and i played it many times and shot much bullets with other guns and not with the mp-40 could anyone please tell me how to change my prefered weapon

Hm, I dunno what you mean! What is your problem!?
I mean just change weapon and scroll to all weapons you've got! Anyway, which missie are you?

i like all of the guns that they have because they are all pretty good

There si a thread for this already.

On that you just DO NOT use the mp-40 in that level, but on the entire game level that doesn't matter. Springfield has the best shot!

My m1-grand is my best weapon to use on multiplayer and on missions.