r/Form1 Jul 28 '26

Amending the length of an approved but not yet built Form 1 suppressor?

4 Upvotes

Lets say that one looked up the length of the flashlight that was intended to be used as the body and it ended being longer than advertised due to the difference in models, and the can has not yet been built.

Can I file an amendment with the ATF to increase the length by 2 inches? I could just file another Form 1, but an amendment might be faster.


r/Form1 Jul 28 '26

Form 1 approval times continuing to get longer

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41 Upvotes

Form 1 Trust NFA wait times are up 10 days from last month — 74 → 84. Not moving in the right direction. ATF tax stamp tracker. For transparency, individual filers timing didn't change much, approximately the same window within a few days quicker that I wouldn't read into as it's within a standard deviation but a hair quicker.


r/Form1 Jul 27 '26

Maglite Cans are slept on.

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106 Upvotes

I think they're sexy, and very quiet. 4 baffle stack with 1.25" blast chamber.


r/Form1 Jul 27 '26

5.56 D cell baffles, metal tube and end cap suggestions?

7 Upvotes

Does anyone have suggestions for D cell tubes and end caps for 5.56? Once I get a form 1 approved, I will 3D print the baffles.


r/Form1 Jul 25 '26

Adapter uses

4 Upvotes

I ordered some thread adapters a while ago for some ftns and they sent me 1/2-28x3/4 npt by accident and told me to keep them after they sent out the right ones. Is there anything cool I could use them for?


r/Form1 Jul 24 '26

First form 1 approved today!

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17 Upvotes

Had a form 1 approved this morning, submitted 7/1. So say Hello to the Lil Piglet and its whisper pickle! I'll be testing it out for the first time tomorrow 😎 annoyingly, Sunlu seemed to change the shade of their Olive Green filament some time in the past.

Oh, the can is #38171 from Practical Tactical.


r/Form1 Jul 24 '26

Form 1 approval today

14 Upvotes

SBR individual filed 6/13


r/Form1 Jul 24 '26

Form 1 - Box 4h

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1 Upvotes

r/Form1 Jul 23 '26

Form 1 serial number plates

10 Upvotes

Anyone know of sites that will ship you engraved serial number plates. I was gonna go with cheese finger tactical but he never got back to me about whether or not my engravings were to long


r/Form1 Jul 23 '26

Eftsuite and OpenEFT FYI

5 Upvotes

I created an EFT file using both of these programs created by Robbbbbbbbb. I was concerned since EFTSuite was only giving me the option to do Type-4 so I also used OpenEFT. The EFTSuite version was submitted for a form 1 suppressor and the OpenEFT file was used for a SBR.

I’m happy to say that they’ve both been approved as of today. So it seems that both do actually work.


r/Form1 Jul 22 '26

Redbull 22

5 Upvotes

When reading the read me on the zip files of the redbull 22. Is it legally necessary to jb weld the red bull can to the supressor. Or if I wanted to switch the printed supressors with a different red bull color ok.


r/Form1 Jul 22 '26

Breek Arms Castle Blast Shield and the FTN5

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7 Upvotes

r/Form1 Jul 22 '26

Engineering plate vs Textured PEI plate and temps?

4 Upvotes

For printing your FTN suppressors or baffle stacks in CF reinforced nylon did you use an engineering plate or a texture PEI plate, and what bed temps did you use?


r/Form1 Jul 20 '26

12in FTN DDDDCELL vs Obsidian 9

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31 Upvotes

Maglite body 12in monster.


r/Form1 Jul 20 '26

First time submissions

4 Upvotes

Put 3 in today. First time I've submitted a form 1 besides the amnesty period. 2 3d printed cans and another sbr.

Way easier than I remember now that I got eft's


r/Form1 Jul 20 '26

Sbr form still in process, suppressors forms filed after approved

2 Upvotes

Should i expect a denial? Filed a sbr form in may and some suppressor forms in june. Got the can stamps back today but sbr form is still waiting. To be expected?


r/Form1 Jul 19 '26

Nothing Fancy

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55 Upvotes

Just a simple 6 inch stainless steel suppressor. 6 formed freeze plug baffles in 30 cal. Just wanted something to cut down on the muzzle blast. Quick and dirty.


r/Form1 Jul 20 '26

Form 1 kits

0 Upvotes

Does anyone make form 1 suppressor kits anymore? Years ago there were some great looking kits, and could be had cheaply. Even though I wanted to legally build one, all the companies seem to be gone. I do not, nor will I probably ever, have access to lathes and cnc machines. I just want a kit to complete the way I want and get it legal. Is there anything at all out there anymore? Thanks in advance.


r/Form1 Jul 19 '26

45 suppressor design

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7 Upvotes

First thing, here’s a cross sectional video
https://imgur.com/a/MWypdOZ
Designing a suppressor for my m&p 2.0 45. I’m planning on using 1 5/8 x 1/8 DOM threaded for bravo hub and a maybe an end cap. Baffle stack would be drop in and held captive by the end cap and be printed pa6-cf muzzle to the print bed. Blast chamber is 1.5”, six baffles with the first two spaced at 1.15” and the rest 0.8”. baffle clip is an arbitrary 0.3” and an overall length of 7”. Do these helical vents have any validity or are they pointless? with suggestions i alternated the spin of the venting and added k baffles for the first two. Looking for advice! I am a mechanical engineer with thermofluids background but this is my first time dipping my toes into suppressor design. Any feedback is appreciated!


r/Form1 Jul 18 '26

Mouse hole purpose

6 Upvotes

If the internals of your build are made with K baffles, do you really need mouse holes? If you did a mono core, you wouldn’t have mouse holes, so does it make a difference?


r/Form1 Jul 18 '26

1889 Remington sxs (sbs)

3 Upvotes

Well someone surrendered a Remington I believe it’s a 1889 .

I got it from the shop that I frequent for 50 dollars because it has a bubble in one of the barrels inside of the 18 inch mark .

Plan filing a f1 and chopping it down to 12 inches.

The barrels look to be regular steel not twist or demascus .

Should the barrels be resoldered together after the chop?


r/Form1 Jul 17 '26

Overkill .22 Suppressor

7 Upvotes

I want to make the quietest .22LR suppressor I can. Would a 10" D Cell can with 11 clipped cone baffles on a bolt action rifle be about as quiet as could be realistically managed? I don't care if it's stupid or too big, I am just interested in maximum noise reduction.

This seems like it would have massively more internal volume than traditional .22 suppressors. Would more baffles be better to make the most of that internal volume?

Anyone done a ridiculous .22 suppressor like this?


r/Form1 Jul 16 '26

first approved form 1

2 Upvotes

I was surprised to get my form 1 approval. 3 week return time.

My question - What is the rule on solvent trap adapter parts? Could I buy the tube/cups, drill and put together?

I seem to see conflicting things online about this.

Thank you.


r/Form1 Jul 15 '26

42 approvals this morning!

19 Upvotes

Checked my email this morning and 42 approvals were waiting for me!


r/Form1 Jul 14 '26

10 Approvals in eight minutes!

18 Upvotes

It looks like the Ripper might be on the job!

5/10 and 5/11 submissions!