Druggedhippo@Jrmmasto @noelreports UiO-66 is thr latest variant but Infrared blocking smoke has existed for decades.
These for example.
Also, don't sell the Russians short. It's not inconceivable that they could create their own infrared blocking smoke using their own formulas.
Al Defaiya | 66mm Visual and Infrared Screening Smoke Grenades for U.S. Marines
American Rheinmetall Munitions (ARM) receives order for 66mm MK 1 MOD 0American Rheinmetall Munitions (ARM) announced today that it has received an $8.2 million order from the Program Manager forAmmunition, Marine Corps Systems Command, Quantico, VA for Grenade, 66mm Smoke Screening IR, Vehicle Launched, (SSVL) MK 1 MOD 0.