Vehicle Smoke launchers.

[ChalkLine]

The standard NATO vehicle smoke launcher is a 66mm grenade. I can't find out what the Soviet standard was on a cursory search. Generally it produces a thick IR-defeating smoke and may or may not be based on white phosphorus. WP smoke grenades are simply WP grenades, there's no difference except they have about three to four times or more the payload of a 40mm WP grenade. As they have a very simple fuzing system they have a larger payload percentage.

However vehicles can also launch CS gas, but that's a niche munition.

Early on and its up to you if you want to reintroduce this but vehicles also had the option of fragmentation munitions for these installations. These were often used in urban fighting or other places where the vehicle might be overrun by hostile infantry. Note that the US M34 WP grenade had a fragmentation jacket.

As a rough guide the standard load for smoke grenades was 32 rounds with four to eight being on each side of the vehicle. Some vehicles expected to fight in urban terrain even had them facing in a 360º arc. These munitions are stored internally.

I'm not quite sure of the firing procedure. I know many installations allowed for single and barrage fire. I hope someone can enlighten us on this.

These little fellas go a long way. Here's a diagram from the M551 showing its arc. As is obvious these things present a very real risk to friendly personnel.