Building an AR-15 entirely* off parts from AliExpress?

*entirely is obviously impossible due to legal restrictions

As a curious fleeting thought, I'm wondering if anyone has done this? I know that the receiver will probably have to be a dirt-cheap Anderson, but I'm also wondering what other parts might be impossible to get (i.e, under ITAR)? Will barrels and bolts have to be domestically sourced?

It would be funny to have a "race to the bottom" on the cheapest AR-15 full of Chinesium.

Cheers.