this gun he's firing is technically considered a "pistol" under the law; because it doesn't have a stock, it does not count as a short barreled rifle. short barreled rifles, or SBRs for short, are illegal or very costly for a person to obtain legally.
if he were to put a stock on it, it'd be illegal. so he's got this thing.
Short-barreled rifle (SBR) is a legal designation in the United States, referring to a shoulder-fired, rifled firearm with a barrel length of less than 16 inches (40.6 cm) or overall length of less than 26 inches (66.0 cm).
I'm pretty sure incorrect use with the right gun or correct use with the wrong gun could lead to vastly different and dangerous results.
Nice to see that our militias versus the oppressive anti-gun government will be armed with plastic boxes and guns that cause you to hit yourself in the face whenever you fire them.
See, there's a great marketing niche. Some kind of gun that can only be fired by a fatass. Make it so that its not even recognized as a gun. Then when the sleek UN eurotrash/combined Africa shock troops arrive to steal our freedom, only the obesest will stand between them, and the AMERICAN WAY!