At first glance it looks like they're putting real guns in their mouths, but in real life they are eating edible ice guns.
They all have different kinds of flavors–cola, cherry, licorice and black currant. They are an addition to the first 50 tinted ice guns that Florian Jenett and Valentin Beinroth made and placed in downtown Frankfurt a few years ago.
These edible eatables where exhibited at an art show called “Freeze Revisited”, and their existence certainly shocked a lot of people.
Several other artists have used weapons as their inspiration, like these fashionable guns and rifles made for artistic purposes.