This just baffles me. https://www.inlanderarms.com/
Anything THAT outlandish is either extreme tactical derp or response to lawfare.
Looks like virtually all of their products LOOK tactical derp, but are very logical engineering responses to lawfare. I applaud anyone putting insane amounts of thinking into getting around unethical, immoral and illegal laws in amusing ways.
https://www.inlanderarms.com/pages/faqsQ: Do I really need to build my 80% handgun this way to be legal?
A: If you are a California resident and intend to build here, yes (AB 1964). If you plan on registering your gun, CA DOJ is asking for proof (pictures) of how it was built legally.
Starting July 2018, all 80% builds will have to go through the registration process with CA DOJ (AB 857).