These 3D printed guns typically involve printing the inert, serialized part of the gun and building the rest of it out of non-serialized replacement parts which you still need to buy somewhere. But still, leave the gun, take the cannolis.
That is the case with this one too, afaik you can't fully 3D print a 9mm. I don't think I've seen anything bigger then a 22lr out of a fully 3d printed gun.
Q: What sort of reliability should I expect?
A: Reliability on my builds has been great. From what I’ve seen, reliability with these sorts of builds
depends on the parts you use. With OEM parts and OEM mags, these frames run amazingly. Aftermarket
slides, barrels, and other parts you can sometimes run into little issues like failures to eject or extract.
Yeah. In this case, it's the same thing as milling out an 80% frame. You're making a hunk of plastic (that the government considers "a gun" and tracks/requires serialization) and inserting a bunch of easily purchased and not-tracked metal parts to make a functional firearm.