Things you can bring on a plane: A homemade shotgun.

Programmer by day, “security researcher” by night, Evan Booth has built, tested, and demonstrated not just a shotgun, but a whole comically named arsenal of DIY weapons, made solely with items purchased in the airport–after the security screening.

Booth’s instructions on using lithium batteries and Axe body spray to create a working shotgun, the Blunderbusiness Class which he test by firing spare change through dry wall.

“I think people have kind of been suspecting that the type of things I’ve built are possible,” says Booth, “I just don’t think anyone’s ever taken the time to do it.” The object of the research is a demonstration–half silly, half disturbing–that weapons are everywhere and that the “security theater” of the TSA is not doing that much to keep us safe.

“If we’re trying stop a terrorist threat at the airport,” says Booth. “It’s already too late.”

The project began after the introduction of body scanners. “It just seemed so invasive, really expensive,” he says. “And if you’re going to go through all that trouble getting into the terminal, why is all this stuff available in the terminal?”

The “stuff” Booth uses isn’t necessarily what you’d expect. Recurring ingredients include dental floss and magazines, Axe body spray, and condoms.