These are basically lower receivers that need work done in order to turn them into functional receivers. They sell for about $100. They come with a jig, necessary drill bits, and the rails.
You have to drill out the holes, cut off some tabs, and cut out a barrel channel. About 30 minutes worth of work.
Then you install a lower parts kit, install your complete slide assembly, and you have a fully functioning firearm. You can use all OEM Glock parts, or custom parts, or a combination.
Attachment 288390
Apparently, since they aren't considered firearms, you don't have to go through an FFL. The media calls them Ghost Guns.
Most people build them because they hate the stock Glock grip angle and shape, but love the reliability and simplicity, so they get a "Glock" with a "better" grip.
I had never had an issue with the stock Glock frame, so was never really attracted to them.
Then, I saw the Sig P320 FCU that lets you do the same thing as far as picking the caliber, grip shape, size, and configuration. I was going to build a P320, but decided to go with the Glock-based P80 build because of all of the extra Glock parts and magazines I had laying around. Plus, the P320 build was going to be around $900 when done. The Glock build will be around $600. Going for a G23 with custom slide and RMR capability with an OD frame.
Watched some videos on how to build the lower and it seemed very easy.
Anyone else build one of these?