Example of the kinds of images the slide is parodying:
You can find a lot more by searching for "私たちが作りました" in Google Images. I don't understand the full story behind these, but I explained it as best I could in a translation note in the third panel.
Release your finger to fire the bullet!What we're developing nowWe made it!is this!Personal Protection Pistol Mark 2!Are they farmers...?The phrase on the slide, 私たちが作りました, appears to be used frequently on photos of farmers standing in a row and showing off their crops.Um... What's the difference between this version and Mark 1?Er, well, everything is different. But the biggest difference is... the bullets...Conventional products use non-lethal bullets made of less dangerous materials, but they still use gunpowder and have an identical structure to real guns.But the Mark 2's internal structure is designed to resemble... a bow... and arrow.Thus, the weapon can be fired without using dangerous explosives.