i just got it too...
i got 5 kill streak with gun...
two kill streak with riot sheild in my first couple of games...
I like the way it feels...fast, fun...
glad I traded for it
DON'T USE THE DEFAULT RIOT SHIELD CLASS.
Or I will slap you. I will drive to where you live and slap you. Then make you pay for my gas because you're being stupid.
Always use Stuns. They're quick and effective.
Secondary really is up to you. (See Perk 2)
C4, Semtex or Throwing Knife is the best equipment. Everything else is stupid. Plus with these you can do the Riot Shield bash trick.
Perk 1. Scavenger/Marathon (The only reason why you'd want to use Marathon is if you haven't unlocked Scavenger.)
Perk 2. Danger Close/Cold Blooded (Perk 2 really is a personal choice. If you're using a throwing knife go with Cold Blooded but if you're using any kind of explosive, even as a secondary go with Danger Close. You need all the help you can get while using the Riot Shield.)
Perk 3. Commando (Use anything else you're dumb.)
Learn the bash trick and you're golden. Hit R3 to bash, right after hit R2, Triangle. Then R3 again. Thrust me I know what I'm talking about, bruh.

I would love to thrust you...