Look at that lockup. Not really anything keeping the breech from being pushed away from the barrel. It also is probably a disguised weapon.

Even if it weren’t a disguised weapon, I would be very hesitant to even fire 22 shorts out of it.

It would be cool if someone made a 12 Gauge version next

That round would be a good candidate for printed ammo.

I don’t know what you mean by “hard to find now”.

The 43R ammo is available on odysee. Same username. It is also included with the Modelo Polylactico files.

No reloading experience needed. You don’t even need any reloading equipment, there are printed tools in 43r files. Loads can be as simple as just a 209 primer no powder, but there are more powerful loads available as well.

There are people that print/make the whole gun (including things like rifled barrels). These are generally called “DIY” builds.

There are also builds that use parts from existing platforms, such as macs, AR, Glock, etc.

Many “hybrid” designs exist as well, that might use some gun parts and the rest is home made.

There are also a ton of furniture, accessories, and modifications for existing platforms.

But yeah we print/make pretty much anything you could think of. I personally like builds that I can completely DIY and 3d printed ammo.

Baby barret is one of my favorite builds I’ve done. I recommend opting for a full size barrel. It’s also one of my most accurate full DIY builds.

CCI standard velocity is subsonic as well.

Barrel length also plays a large role in how quiet a gun can be. My baby barret, m4gery, and sr722 all have barrels longer than 21" and are very tolerable with standard velocity ammo without using a can.

On the other hand, my 22lr builds with 1.5-4" barrels are some of the loudest pistols I’ve fired.

CCI quiet “semi auto” ammo helps a ton too, even with the shorter barrels. Aguilla sniper subsonic is really nice just harder to find and some guns don’t cycle it well.

Probably the SY22. I’ve never built one, but many have with success. The NULL is supposed to be an improvement over the NAG, but I have yet to try one of those either.

It Is known to be an unfinished model. Although it contains some very intuitive design features, there are too many flaws to be worked out as it is.

I’m not saying that it’s impossible to get one working, but it’s not going to be a fun time, and will require overhauling many of the models.