I recently received some “Zombie Blaster” muzzle-blast blanks from Lightfield in .410, 12ga, and 20ga. Here are the pics (the first pic is a factory pic from Lightfield and it appears that they used one of their 2-ball non-lethal loads to show in the 12ga pack as they must not have had the proper blanks to put into that pack yet for the promo photo?):
If given the option, I would still choose any type of buckshot load over these muzzle-blast blanks. At least Lightfield makes it clear that these are novelty intended (on the front insert).