Issue 20: New DD19.2 Chassis, DIY RPG, Side-Feeding Mac, Anti-3D2A Bills
Dig deep and remember that you are not descended from fearful men
Welcome to the Guncad Digest! This newsletter will regularly round up the best and most interesting 3D2A releases, betas and news.
If you want the Guncad Digest delivered straight to your inbox, you can subscribe to this Substack.
You can also follow us on Twitter, Instagram, Facebook, or Reddit, where we’ll post notifications when a new issue of the Digest is live!
In this issue:
New Releases:
In this section, we cover new file releases that we find notable. If something catches your interest, go download and start printing!
Pillager Chassis for DD19.2 Releases
In Issue 18 we shared a TX22 chassis called the Pillager and noted that a version for the DD19.2 was in the works. That version is now released!
The creatively-named DD19.2 Pillager Chassis from Ballistic 3D Solutions gives you a cool new option for turning your Glock into a PDW, complete with a sliding brace and spare mag holder / foregrip. Kits are available at the developer’s webstore!
There was a time in guncad that these sorts of chasses were fairly popular (the most famous being the Invader) but they’ve somewhat died down. It’s nice to see the Pillager come in and revitalize this space.
DS27 Pull Tab for your Belt Fed
Beltfed designs are becoming more popular with the release of stuff like the LimaSix beltfed upper or the eagerly anticipated Black Lotus DIY beltfed. As such, we’re starting to see cool accessories to work with these guns!
Today’s find is a printable pull tab that you can clip onto a belt to assist you in pulling it into the loading port. This allows you to avoid opening the top cover, so if you really really need to swap that belt super fast, you’ll be covered!
Updates:
In this section we will mention updates to major releases - fixes, new variants, etc.
L.A.R.K. Gets Updates
In the last issue we discussed the L.A.R.K. fire control system, which introduces three-round super safe functionality and in general is really fucking cool. It’s got some updates available!
First we have the L.A.R.K. Simplex, a three-position version of the L.A.R.K. (safe, 3-round and full) which functions with a standard single-slot trigger. This is likely the more accessible version of the L.A.R.K. for most people, so if you haven’t tried building one yet, this is where you should start.
We also got a 2-Round Cam for any L.A.R.K. variant which reduces your burst from three to two. Why? Why not? Apparently the dev is thinking about making a 5-round cam as well - obviously I’ll feature it if he does.
I feel like I should be seeing more discussion of this than I am. Let’s get on it guys!
New Betas:
In this section we round up recently opened betas. Help support development by joining these betas and testing!
RPM-85 85MM Launcher Enters Beta
We’ve featured developer PracticalTactical before, but this design takes the cake! It’s an electrically-fired rocket-fired 85mm launcher. Wow!
PracticalTactical notes that the projectile is sized to be used with a 29mm rocket motor. The printed parts sleeve over a length of 85mm ID steel tube (available from McMaster) and the entire thing is wired up to fire via pushbutton.
This project is a true beta and does not appear to actually be complete yet - from the current release I don’t see any details about how to actually ignite the rocket motor (if I’m wrong, please correct me!) Interested parties should join on and build along, adding on new parts as they release.
Note that, if it wasn’t already obvious, there are legal complications with building this project, so make sure you’re aware of that!
.410 Kurt-Go-Bang Shell Enters Beta
DIY ammo always gets a shoutout from me, and that is certainly the case here. Our boy Booze and Bullets has modified the Kurt-Go-Bang printable shotgun shell for .410 gauge.
The description notes that the projectile can be either a .308 bullet or a ball bearing. Remember that this is a beta, so if you do play with it, start with small powder loads and work your way up.
Project Chimera (Modernized CZAR) Enters Beta!
I like it when a project graduates from Coming Soon to Beta - it’s like watching a child grow up. For those who missed it the first time, Project Chimera is a printable lower and chassis for a VZ61 by developer Metalhead Twink / Penteona.
Aside from the coolness of a new VZ61 project, the developer for this project has intimated that he plans to take it further all the way to a DIY VZ61 upper, which would really be a step forward! I will watch this with great interest.
If you want to check this out, join Penteona’s Matrix space at the link in the forum post!
“AR-9 RU” - Fully DIY AR9 from the Motherland
Every so often I feel like I should include something in the Digest that’s totally out of left field, just to keep things interesting. That is certainly the case for this design.
The designer, modestly titled “The Best Handmade Guns Channel Ever”, has recently been releasing a series of fully DIY designs for various platforms. This AR9 RU design is the latest of those. Yes, it features printed parts, but it also leans very heavily on metalwork, lathe work and other fairly advanced operations. It reminds me of Professor Parabellum’s work, which is a good thing.
This is not just an alpha but a pre-alpha - despite that it actually has some fairly decent documentation. I would genuinely like to see more developments of this sort, and not just because any new designs are good designs. Imagine a world in which metalworking skill was made as ubiquitous as printing and CAD skill? What could we accomplish in such a world?
Coming Soon:
This section lists announcements or previews for projects that have not yet hit open beta. Keep an eye out for further news about these projects!
Feed Your DB Alloy with MP5 Mags
DB Firearms reminds us why he’s king of Mac designs with yet another new DB Alloy mod - this one is a lower which allows the use of metal MP5 magazines, which are universally accepted as far cooler looking than Glock mags. Yes, DB has found a way to use the single-feed Mac bolt to feed a double-feed MP5 mag.
This “DB Alloy MP” will require modifying the Mac upper somewhat, so be prepared for that. An open beta is coming soon - keep an eye out!
Bullpup MP5 Design On Its Way!
The Twink delivers! Continuing the 2026 theme of “bullpup everything”, Metalhead Twink / Penteona has announced a Bullpup MP5 lower is in progress.
Details are scarce but it looks damn cool. If you want to learn more and participate in development once he opens it up, join the Matrix space in his forum post!
Sten Your Mac - Side-Feeding Mac 11
Gentlemen, take notice: this is what guncad is all about. From developer SkeleTim561 comes a side-feeding, bottom-ejecting Mac-11 that takes Sten mags and uses an AR FCG. Fucking. Cool.
This is all pretty new so nothing has been revealed, but even money is that he’s simply turned the Mac bolt 90 degrees. Longtime readers know I’m a sucker for weird shit like this so I fully support it and will almost certainly print one once it releases. Nice work!
Orcbolg Fully DIY .380 Pistol Gets a Refresh
We first promoted this design back in Issue 11, and I’m happy to see that it’s still going! According to the developer, he’s overhauling the design and hopes to have a new version ready within a couple of weeks, at which point he’ll open the beta back up.
This is a fairly novel leap, as we haven’t seen a fully DIY semiauto pistol in .380 yet - as such I’m not surprised that we had to go back to the drawing board. It’s still proceeding and that’s what matters! I look forward to seeing more.
News:
In this section we’ll review major news events either originating in the 3D2A space, or particularly pertinent to this space.
Anti-3D2A Bills on the March
As predicted, following the introduction of California’s AB-1263, several other states have followed suit, introducing their own bills meant to combat 3D2A. It is worth our attention to review them, so here is a roundup of all the bad bills working their way towards passage:
California AB-1263: the first of these bills to be introduced, this is the bill that bans distributing 3D printed gun files in California as well as “facilitating” the manufacture of an unserialized firearm. This bill is passed and is what the Gatalog is being sued under.
California AB-2047: mirrors Washington’s HB-2321, requires 3D printers install gun blocking technologies in order to be sold within the state. This bill has been introduced but has not advanced anywhere.
Colorado HB26-1144: similar to many of the other bills here, prohibits printing or milling a firearm by non-FFL holders, and prohibits possession of CAD files. Also prohibits distribution of CAD files. This bill has passed the Colorado house.
Minnesota HF-3407 / SF 33661: bans all firearms manufacture by non-FFLs, full stop (no ability to make your own and serialize). Bans the distribution of CAD files / STLs / gcode that “may be used to…manufacture a ghost gun” - a mirror of California’s AB-1263. Also bans the possession of any unserialized firearm. This bill is in committee.
New Jersey S-3894: this may be the worst of the batch. This bill makes it a third degree crime, punishable by up to five years in prison, to simply possess a 3D printed gun file. Those with long memories will recall that New Jersey was the first state to introduce legislation to ban distribution of 3D printed gun files (New Jersey S-2465); it is this statute that Defense Distributed sued New Jersey over. As such it is not surprising that NJ is leading the way with the worst bill. This bill has been introduced but has not advanced anywhere.
New York S. 9005 / A. 10005: copies Washington HB-2321 and California AB-2047 by requiring 3D printers install malware to detect and block firearm prints. This bill is under review and is accepting public comment.
Washington HB-2320: mirrors California’s AB-1263 by banning the distribution of 3D gun files and the “facilitation” of making a firearm by an unlicensed person. Goes one step further and bans the possession of 3D printed gun files “with an intent to distribute the code…[or] to manufacture a firearm”. This bill has passed the House and the Senate and is on its way to being signed.
Washington HB-2321: the famous bill that requires malware to be installed on a 3D printer to block gun prints, in order for that printer to be sold in Washington. Currently in committee.
That’s the roundup. What can men do against such reckless hate?
It should be noted that many of these bills may not pass. Those who advanced them are riding a wave established by California’s passage of AB-1263; but many of these states have introduced similar bills before, which went nowhere. It is not guaranteed that these will all pass either.
Still, it is likely some of them will. We can only advise what we always advise - turn to technical solutions. Create technical workarounds. Fight on, and remember your forefathers - in Germany, in Brazil - who built guncad in far worse circumstances.
The Great Discord Purge of 2026
With all the sturm und drang in our last issue, we somehow completely forgot to mention yet another crackdown - Discord went on a binge and purged two of the largest 3D2A Discord servers, Black Lotus Coalition’s server and Guncademy.
The purge seems to have abated, and FOSSCAD’s server seems to have survived. Still, backups and alternates are being established, which you should pay attention to:
Guncademy has been reproduced on Matrix
Black Lotus Coalition recommends joining their public Matrix space
FOSSCAD, despite not actually being banned, still set up their own Matrix space as well.
For every head you cut off, we’ll grow two more.
Other Links:
This section will collect any other links I find interesting. These may be older designs I want to share, releases I find notable but don’t have much commentary on, or anything else that catches my eye.
It pleasese me that we’re still seeing new Kabuto remixes, especially given the precarious position of the Super Safety. Here’s a new one from Quick Draw Precision that simplifies the design and reduces friction.
PracticalTactical reminds us that spreading the signal isn’t just about sharing CAD models, but knowledge in general. Why don’t you take some time to learn about explosives?
Got a belt fed (and if not, why not)? Save some time linking ammo with this M27 Linker from 3DBoberBuilds. Note that this works with actual M27 links, not the printed version in the M1337 - the M1337 has its own linker.
About the Guncad Digest:
Thank you for reading this issue of the Guncad Digest! Please send us your feedback and suggestions for improvements on the issue.
The Guncad Digest is sourced using the very excellent Guncad Index, from /r/3D2A, and from readers like you. If you know of a project you think should be featured, send it our way!
This issue was compiled and authored by Alyosha from 3D Print Freedom / 3D2A. We sell high quality parts kits for some of the best DIY guns available - if you’re looking for your next gun build, come check us out!