2 questions....
when I just would get blown the ^^^^ up for what seemed like no reason .. was somebody setting mines or is it me just not hearing the grenades come in on multiplayer like you do in the campaign?
and are there weapons racks anywhere in multiplayer levels? mainly for grenades. I know you can pick up gun ammo off other people.
I think the Saboteur badge has mines that he can put on walls or on the ground but i doubt any of us at that time has that badge yet so it was probably a grenade that you didnt see.
Happened to me a couple times too.
In the review videos they said the Engineer can repair ammo boxes but I have yet to see what you get from those.