Yes. You can buy them in the villages. There will be many "items" for Your weapons, so it will be really interesting. And realistic. You'll be able to get diamonds and money for the missions, but i think there will be animations for it, and NO digital screen.
And can somebody tell me, if we'll be able to pick up the enemies's weapons? I saw something in the videos, but i'm not sure of that.
Yeh. Have You Saw The Weapon Modifications On Army Of 2. You Have Lots Of Weapons To Choose And Amazing Upgrades. You Need Like A REALY Long Sniper Rife Will A MASSIVE Silencer On. That Would Look Kool!