Defense Distributed, the minds behind 3D printed guns, is coming up with a jig that will make a 80% lower. The pre-order is available at https://ghostgunner.net/index.html So far the $999 version is sold out, and $1199 version is available.
The jig is programmable and is open sourced. The name comes from Kevin De Leon(CA legislature) who called 80% lowers ghost guns during his press conference for now vetoed California State bill.
WIRED has an article on it