Killzone Questions...

Hi there, would really appreciate some knowledge for a few questions I have on Killzone Mercenary.

1. When I play online, I often find myself running out of ammo. Is there any Blackjack weapon boxes in Multiplayer maps? Some guns are meant for long range (rifles and snipers...) so I can't always collect ammo from people I have killed.

2. I like the Cloaking VANguard, but it uncloaks for a few seconds when I fire. How do I upgrade this like in Killzone 3...? Or does it upgrade after I do so many kills when it is enabled?

3. What is the best VANguard out of the following for stealth/sniper: Ghost (cloaking) or Vulture (for seeing all other players)?

4. What is the best Sniper rifle?

5. What is the best Pistol?

6. What guns are there that are in Shadow Fall/ are similar?

Thanks for the help

 

Just answer one if you don't know all.