User blog comment:GunsSwordsFlames/signature weapon in COD4, WaW, and MW2/@comment-1724339-20100719091054

Mw2: Riot shield, M9 tac knife, Marathon pro, Lightweight pro, Commando pro, Throwing knife, stun grenade, martyrdom

OR!

Mw2: Barrett 50.cal Thermal, Akimbo rangers, SoH pro, Stopping power pro, Ninja pro, Blast shield (for claymores and grenades), Smoke grenade, martyrdom

they probs not signature but they really good and always use when the time is right.