I have been tinkering around with the riot shield class. I believe I came up with a good selection.
Primary: Riot Shield
Proficency- melee or speed its up too you.
Secondary:XM25 or your choice, XM25 I will explain later.
Lethal: C4
Tactical: Trophy System
Perk 1: Recon
Perk 2: Blast Shield Pro
Perk 3: Sitrep
Strike Package Support: UAV, CUAV, and Sam Turret.
Deathstreak:Dead Man's Hand, Don't do the pooping a grenade one (martydom)
I go Melee cause of morons who run in the room and don't look around, you can hit them twice before they notice.
I go XM25 cause the ability to detect enemies with recon, just a couple shots around a building XM25 kicks on recon and shows where they are.
I go C4 for the fact is if you are doing domination and watching say B on interchange just throw that down with a trophy system they won't expect it.
Trophy system Protects your *** from Grenades, Semtex, Flashes, Stuns, Smoke, Boucing betties, C4, EMP Grenades, Predator missles, Readers and AC-130's
Recon to show enemies with explosions and etc.
Blast shield to protect you from well explosions duh.
sitrep so don't step on miss betty
Strike Package: cause you may NOT get many kills but you are still helping your team.
Deathstreak cause some douche will come up close to kill you,
Best gamestype for this Setup, Headquarters, Sabotage, omination and Team Defender.