Backpack?

[Kingpin]

According to one of the interviews, you can equip a primary with accessories, and a secondary with accessories, and a backpack slot.  Does that mean that there is one thing you can put in the "backpack slot" such as just a rocket launcher or just grenades, or is this equipping system going to be more like what RPGs do and you can rearrange to put stuff into it?  It would be nice if you could take as much stuff as you could under a certain weight limit, with greater weight affecting gameplay such as running and climbing or even stealth.  I think that would a really great way to get realism back into the game instead of only having 4 slots and one thing per slot.