The Riot Shield is a "primary weapon" which is basically just a shield. This shield allows you to deflect bullets from enemy weapons, but your feet
Thermites Changed My Riot Shield Gameplay In Warzone 3 (Best Riot Shield Class MW3)
Call of Duty: Modern Warfare III - IGN
Call of Duty Fans Want Controversial and Irritating 'Weapon' Removed From Modern Warfare 3
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Call of Duty: MW3 Guide - IGN
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Riot Shield, Call of Duty Wiki
COD MW3 Has FINALLY Nerfed The Riot Shield!
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MW3's Riot Shield is getting a buff and a nerf in season one update - Dot Esports
Finally, the MW3 Riot Shield has been given a proper nerfing - VideoGamer