Can Heavy Flak Grenadiers do a sustained attack?

Sure, as long as their flaks are loaded at the start of the round. And yes, it's a ludicrous amount of dice rolled against a stationary target.

Loophole Master said:

But it can be a lot of fun to see an opponent's reaction to it.

The last time I saw someone introduced to it, it was my daughter firing with both the Heavy Flak Grenadiers and Lara in a sustained attack.

Yeah, I had one of those inflicted upon me. 28 freaking dice with sustained fire. It's not even funny....

Nowadays I make it my priority to obliterate Lara and her Flackers first thing.

Just a powerful combination.

Psykostevo said:

and then generaly for one turn only, after that, no sustained fire for either unless Lara and the unit split.