r/3D2A

▲ 20 r/3D2A

Replica M2 60mm mortar

This is my love project! A nearly 1:1 M2 mortar, late WW2 design, my plans for the future are making it blank fire or launch dummy rounds, but it is almost fully 3d printed, minus some nuts n bolts plus some aluminum rods for reinforcement. If anybody has ideas for blank fire or improvements let me know!

u/Normal-Gur-6432 — 1 hour ago
▲ 16 r/3D2A

A 9mm PBS-4 clone, made with KP9s, AK-Vs, and others in mind. The 3DS-4 is finally here!

HUGE credit to u/InfamousMuffin5961 for all of his help on this project and the wonderful shootin vid. (Yes, a piece goes flying in the video. Do not be alarmed, this is a purely cosmetic, replaceable piece and there is a beefier version included.)

Sailing under Kruscle on that weird ocean place! Titled 3DS-4

u/Jrmuscle — 1 hour ago
▲ 40 r/3D2A

We want your help building community standards for releases

Alright everyone I have a question for you but first an explanation. The community has come together many times to try and make a guideline for releases for new devs who release projects in our spaces. Whether it's a team build or an individual dev the outcomes are always different and you will find varying quality per release and dev.

What do you think should be included in project releases? What are you looking for when you want to remix a project and when you are getting started on a brand new project? If you're interested in getting involved with the developer or a testing team what kind of communications do you want to get involved with to assist? Can you think of anymore questions that could benefit this line of thinking and help us get a list of standards we should be seeing in these packs?

Now of course we aren't going to be policing this and you shouldn't be either. But we as devs, testers, and consumers in this space should have a general guideline of what we all want to see in project releases and what goals should be met before putting projects out as full releases. Whether devs meet that standard will be completely up to them.

u/Unhappy-Message-4419 — 11 hours ago
▲ 16 r/3D2A

Can GOA members make suppressors without form 1?

Ok I know we are just people of reddit and it might be a dumb question but just want to get a few other people's take on it. I've been researching this and reading some stuff. Some things say that since I'm a GOA member I don't need to do a background check and I can manufacture a suppressor. I've also read that yes it gives me the right to manufacture a suppressor but I still need to go through the process of the form 1. Can anyone clarify for me? I'm in Texas.

Edit saying what state I'm in.

reddit.com
u/MrWagons1975 — 12 hours ago
▲ 13 r/3D2A

OK Zoomer V2 is the way to go!

I liked the V1, but came with a few issues no matter how many times I reprinted the frame.

The V2, works way much better.🫡🫣😉

u/Forsaken-Pound9650 — 9 hours ago
▲ 33 r/3D2A

Form 1 approval?

First timer, submitted two form 1’s on Monday for a FTN.5 PCC and FTN.6 Rifle for my gun trust via ATF eForm.

My understanding was wait times were 1-2 months but I just got notification this morning both were approved. Am I missing something or am I good to go?

u/Letsgetr0pical — 13 hours ago
▲ 13 r/3D2A

Double barrel 37mm/other launchers?

Full credit for the purloined image goes to u/Porcodiocan.

Lately I’ve had more than a passing interest in how flare launchers, and launchers more generally, have been developing in the 3DP world.

I was particularly pleased that a certain compact 15mm launcher I once saw on the old sub ended up becoming known by the name I suggested in an early public thread: the Projectile Dysfunction.
I’ve been around DIY firearms and adjacent projects for a long time, but flare launchers were never really part of that scene back in the day. They seemed to remain almost entirely the preserve of full-scale manufacturers, so on this particular subject I’m coming from a position of curiosity rather than knowledge.

Which brings me to the image which has probably caught your attention, too.

I came across the pictured concept on an unnamed 3DP sub concerned with airsoft: a pistol-style, side-by-side 40mm double-barrel affair.

Seeing it made me wonder something surprisingly basic: Why has nobody, as far as I know, commercially produced a compact metal side-by-side 37mm launcher along broadly similar lines? Other than the fact it is not going to be borrowing from a military launcher, of course.

It seems like such an obvious novelty/signalling-launcher configuration that I would have expected somebody to have made one by now. Is there some mundane engineering reason it becomes unattractive…. weight, bulk, action geometry, cost, extraction, liability, limited demand… or has the market simply never been large enough to justify it?

And, separately, how realistic is the general double-barrel 37mm or other signal launcher concept in the 3DP world? Does printing make a configuration like this substantially more attractive because the awkward/expensive parts of producing a low-volume receiver or action become much easier, or do the same fundamental problems that presumably discouraged commercial manufacturers remain?

u/artisanalautist — 15 hours ago
▲ 2.3k r/3D2A+2 crossposts

Big gun stores don't want you to know that home depot also offers great options

u/TheTaxStampCollectr — 1 day ago
▲ 150 r/3D2A+1 crossposts

[Megathread] Decisive Victory in Federal Right to Make Firearms Case

BREAKING NEWS: the second major legal victory in as many weeks, a federal judge just issued summary judgement for the plaintiffs in Defense Distributed v Blanche, better known as the VanDerStok case. This victory eliminates the ATF's 2022 "ghost gun" rule change and establishes that the 2nd Amendment covers the "right to make or repair personal firearms."

Read the opinion here: https://saf.org/wp-content/uploads/2026/08/Defense-Distributed-opinion-8.19.26.pdf

It's important for the 3D2A community to understand what this means for them, and what it does not.

As with all breaking legal news, this will take time to understand - the information below comes from conversations with my legal contacts, public reactions from other 2A legal figures, and my own read of the decision.

1. What does this decision do?
This decision pertains to the 2022 Biden ATF frame or receiver "final rule," which among other things redefined "firearm" an extremely broad, vague definition which includes unfinished frames / receivers ("80 percenters"), parts kits, combinations of parts sold together and more. The effect was to broadly expand the ATF's ability to regulate (most notably to require 4473s and serialization for) products that, up until that point, had not been considered "firearms".

This decision declared that ATF's "final rule" was unconstitutional under both the 2nd and 5th Amendments. It provides both injunctive and declaratory relief.

The injunctive relief prohibits ATF from enforcing its "final rule" against the named plaintiffs for certain products. But, and unlike the NFA case, this case features declaratory relief that much further establishes the unconstitutionality of the "final rule," prohibiting the federal government from enforcing the rule in any way.

2. How was this decision reached?
The court declared that the "final rule" was unconstitutional under the 5th Amendment due to its redefinitions being excessively vague, which is a violation of 5A's Due Process clause. The extreme broadness / vagueness of the ATF's new definitions "[did] not provide fair notice of what is punishable and invites arbitrary enforcement."

More notably for us, the "final rule" was found unconstitutional under the 2nd Amendment because it unacceptably infringed on the "right to make or repair personal firearms", which the court declares is covered by the text of the Amendment. The court further affirmed that a Bruen analysis reveals that homemade firearms are central to the American tradition and that there is no history or tradition of regulating them.

3. What will the effects be of this decision?
The immediate injunctive relief allows the beneficiaries (listed below) to buy and sell four different products. This is quite narrow and so we can ignore it.

The declaratory relief is (at least in theory) far broader and far more important for us. By declaring the "final rule" unconstitutional, ATF is now on notice that they are constitutionally prohibited from attempting to enforce this rule. Language is included that can be read to say that this relief is "as applied" only to plaintiffs, but the broader fact remains that black letter now exists declaring that Americans have a right to make, and that the ATF cannot constitutionally infringe upon that.

4. Who does this decision cover?
Like the Silencer Shop NFA case, the injunctive relief is quite narrow, covering only the plaintiffs: Defense Distributed, Second Amendment Foundation (SAF) and SAF's current and future members.

The declaratory relief however, may be read as broadly as possible, and is at least useful as authority to any American who wants to buy, sell, or make a firearm.

5. What does this mean for 3D2A?
If this decision only included the injunctive relief, it would be a curiosity at best - but its practical and legal importance may go much further, accomplishing something that the DIY firearms movement has been fighting towards for its entire existence. This decision is one of the first to establish in black letter that the 2nd Amendment includes the right to make (and repair!) firearms.

This doctrine goes well beyond 80%s - it touches on all forms of making firearms, and all types of firearms - including items legally determined to be firearms, such as suppressors. The significance of this cannot be overstated.

All US laws, state and federal, that might infringe on this right, are now subject to constitutional challenge. For example, there are multiple right-to-make cases in California which will benefit from this ruling.

Despite the narrowness of the injunctive relief, I expect that the declarative relief will lead to the revival of the 80% market in some form, which may be of interest to many 3D2A members whose interests are not limited solely to printing their guns. But more importantly, our community can now correctly argue that any existing or proposed law which would impede our ability to privately make firearms is facially unconstitutional.

6. Does this mean I can start printing machineguns now?
As much as this is worth celebrating, I want to conclude by tempering expectations. This decision does very little for the average 3D2A member in the immediate here-and-now. Most of the laws that limit what we can make are still on the books. If you live in a restrictive state, your state laws haven't yet disappeared.

Parts kits vendors such as myself, who have always had to consider the "final rule" in how we structure our kits, are more immediately affected, and you may see new ways of doing kits coming in the wake of this decision.

The broader practical effects of this decision will be more long-term. By all means, celebrate it - this, and the NFA decision, are two of the biggest victories the DIY gun community has experienced in decades. But celebrate safely, and keep your powder dry. The best is yet to come.

reddit.com
u/Alyosha3DPFreedom — 1 day ago
▲ 2 r/3D2A

Polymaker Reccomended Print Settings Vs 300BlkFDE

I cant just talk about a cool thing so heres the 4570 form1 I just got approved for, Its based on the Middleton Made Pill Popper but it uses an FTN insert instead of regualr thread adapter and its got modified squatty baffles and its all be scaled, smushed and stretched for .458 to accomidate a 4570 lever action.

Ive been doing alot of printing recently in PA612-cf and Ive been using a apparently really outdated screenshot copy of the 300BlkFDE settings for feeds and speeds and apparently the reccomendations have changed a bit in the last 2ish years and 30mms isnt the speed limit anymore.

Im currently working on a very large Form 1 device that was approved yesterday and I was getting the backup solar power generator prepped for a 4 day print and when i sliced apparently Orca crashed and reset everything to defaults. After looking on here I found a few screenshotted copieds of the 300BLKFDE process and the speeds are now much faster than my old profile.

So heres the question. if people are printing massive Form 1 devices that you only get to print once, are you running 15mms first layers and 20-30mm other layers like the old 300BKFDE process or are you guys running a slightly faster 40-50mms. I suppose I should include Im printing on a non-modded P2S using a flow tuned Polymaker filament profile at 280C, 100C bed with a release agent.

reddit.com
u/Hawkbait_3D — 22 hours ago
▲ 0 r/3D2A

.22lr suppressors?

Just curious what everyone’s favorite .22 suppressors are and where one could locate the file. I’m looking to file my first form 1 to complete my deAR22 build

reddit.com
u/Objective_Care_9401 — 1 day ago
▲ 129 r/3D2A

Ciwielab AB is going into hibernation for at least the next few months for some personal reasons. I wanted to let y'all know so as to explain the significant slowdown in releases.

Love you guys! I'll be back at some point, and better than before. In the meantime, I just released a polymer-sheet hybrid AR9 lower that should hopefully keep you satiated for a while, lol.

u/ciwielab — 1 day ago
▲ 39 r/3D2A

Playing around with Printed Ammo

Had a brain blast recently, still need to sharpen my firing pin a little bit, but the ammo holds up to .209 primers after multiple shots.

u/BrewBoy420 — 1 day ago
▲ 15 r/3D2A

Recently got my first form 4, and would like to form 1 a can.

I was talking to a guy at the LGS *who i got my first can off of* and the vibe immediately changed when I mentioned wanting to form 1 my own can, I live in a state that permits 3d printed firearms *for now*, he said it was a whole lot of work and just a pain in the ass and I immediately got the feeling that he didnt want to talk anymore.

I kinda got the feeling he was pissy because i wasn't buying their cans off of them, he told me they are primarily for RnD which from what I see around here, isn't the case.

Am I missing something when it comes to the law or something?

I follow 2a news closely and am 100000% legal when it comes to all my firearms and stamps, I just dont get the immediate vibe change.

I may have read the room wrong, but im usually pretty good about that.

reddit.com
▲ 2 r/3D2A

Anyone use this as a dryer?

I just bought some cf nylon and outside of a couple dedicated dryers, the consensus here is an air fryer or dehydrator is best for drying. Anyone have experience with this one in particular? It was only $50 so worse comes to worse I'm not out a large amount of money.

u/ExtremeEmphasis — 24 hours ago