Why was he still carrying it around? He could just print another one. 
this post was submitted on 09 Dec 2024
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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.
The FGC-9 (9mm) isn’t fully printed, but is impressive for at least being fully DIY.
I know 
So easy to get rid of and replace. Must just be ego.
The libertarian driller
A doohickey, to surpass the previous doohickey
Some info on the gun itself: https://3dgunbuilder.com/pistols/glock-19-frame-dd19-2/
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.
From the pdf FAQ
failures to eject or extract.
Like that'll happen
To be fair, the issues seen in the video were almost certainly from using subsonic rounds in a blow back operated gun, not an issue with the gun itself. Even in a factory built gun, subsonic rounds often don't have enough oomph to cycle the slide on their own. Sometimes they might but you should be expecting to have to manually cycle the slide if you're using subsonic rounds in a stock blowback operated gun.
The only real fix is to swap out the recoil spring for a lighter one (which can cause other issues) and/or use subsonic rounds that are specifically designed for your exact model of gun (if even available). There are technically other things that can be done but for those you're looking at gunsmith levels of work.
That print probably works perfectly fine with normal ammo.
Subsonic rounds and a supressor are exactly the type of things this maker is talking about.
I don't know much about printed guns. The barrel, striker and extractor have to be metal, right?
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.
I was right!
Well kinda. It's not quite a boondoggle