ITAR rules apply, The idea behind the iconic riot shield is as old as shields themselves - a carriable protective barrier against your adversary.
PAULSON, Military Police Riot Shield - 400U77
Paulson BS-9 Heavy Duty Riot Shield - 24x48
Ivan's Gumball Time Machine – KommandoStore
Paulson Heavy Riot Shield Model BS-9 (24 x 48 x 0.25) — INVTACTICAL
Products – Page 16 – KommandoStore
Paulson Capture Riot Shields
Used Paulson Model BS-2 Anti-Riot Body Shield 36 X 20
Capture Clear Shield w/ Ambidextrous Handle, 24 x 48 - Defense
Surplus – Page 5 – KommandoStore
All Products – Page 18 – KommandoStore
Paulson BS-HK Riot Parts and Accessories, Replacement handle