Using only Legos and rubber bands, Jack Streat was able to build a fully-functional replica of a Heckler & Koch UMP 45 sub machine gun.
This is far from the only time Streat has fashioned a potentially dangerous thing out of Legos; he was able to build a working chainsaw out of the construction toys, and has a Youtube channel full of videos of other Lego weapons he has assembled.
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This week, a third grader sauntered home with a loaded Taurus 9mm gun in his backpack and showed it off to his mom.
As it turns out, he bought the weapon from a classmate for $3 at their elementary school in Queens, NY.