After my last post about my shit print, I got a lot of good advice and a lot of not so nice criticism. Regardless I took everything you all had to say and have learned a lot in the last few weeks, cant wait to share with yall how it turns out! I would like to add though, to those of you who are more hostile to beginners, stop it. It might’ve helped me but it will turn a lot of people off of this. Maybe we should all just focus on learning and teaching each other, rather than being nasty and gatekeeping.

Liberator will be 22lr using a barrel liner. This is a very basic STL I found about 2 years ago and just decided to start working on. The STL needs a lot of work. Can’t remember if it came from grad cad or thingy

I wanted to shoot rifle at local Rimfire Challenge shooting matches but didn't have a suitable rifle. 3D2A to the rescue!

Galileo R2 receiver printed in Overture PLA Pro with handguard, grip, and brace in Polymaker ASA. Grip is the Laff I M SPEED. Brace is the Carbon Folder. Running a Faxon pencil barrel, Ruger 10/22 bolt, BX trigger, and CV Life optic.

Only issue in the first 100 rounds was a failure to feed on the last round in the mag. But since it was a brand new BX-25 magazine, I'm inclined to blame it on the mag. First match is in three weeks - eager to see how it runs.

Whats the best print for a 9mm electrochemically machined barrel which is 11 inches and has virtually no professionally manufactured parts required? (apart from the magazine)

I'm working on a scope mount for a Calico. Has anyone used Multi Jet fusion for something like this? I Was going to make it from aluminum but it seems like MJF would get me to like 80% and not terribly expense to get printed.

Alternatively any other processes I should look into?

Lastly for Picatinny rails and 3d printing what is everyone using for dimensions? On my FDM prints I've just been using NATO rail dimensions, and they have worked so far.

Thanks guys.

One of the biggest points of debate for our hobby is what material to use. PLA, PA 6, 12, 612, PC, ASA, Carbon filled? Glass filled? Etc.

When I think high quality polymer, I think H&K. The G36, MP7, USP series, and the FCGs on their roller delay models. I acknowledge that the G36 had some controversy over the sturdiness of the polymer but I still think its a good idea for at least a baseline.

I also acknowledge that an exact chemical blend is a closely guarded trade secret, or else I could have found my answer through a google search. I can find info that Glock uses a custom polymer based on PA 6, but beyond it being fiberglass reinforced, I can't find details for H&K.

So, does anyone know what the base for H&Ks polymer is? PA 6 GF? PC GF?

Like many of you, I have at least a few unfinished projects, so I made a list of those I want to complete. I thought that someone was working on a double barreled nt79. Is that still in progress?

I saw that DigitalNimbusLabs used to have a website with parts kits for these but it seems to be gone nowadays, anyone know if someone else has picked up manufatcuring of these kits, or knows a good place to get some parts? (McMaster-Carr has been helpful for me in the past). Thanks in advance!

HD22 - Attempt 1

Bullet wedged inside magazine

Evening everyone. I'm 99% done with my first build, with only a few improvements to make before taking it to the range for the first time.

I've been having issues with the magazine, specifically the feed lips and bullets getting lodged inside the magazine. The feed lip issue was noted by some other Redditors, so I followed their advice and shaved down the lips ever-so-slightly. So far so good, I may need to take off a little more as it still seemed to have fitment issues with bullets in the mag.

I have not, however, seen anyone mention anything about bullets getting stuck inside the magazine. When loading the magazine with six or more bullets, one inevitably gets misaligned, causing it to get stuck. Furthermore, I'm physically unable to load more than nine bullets in total.

I made sure to print everything at 99% and used TeachingTech3D's website to fully calibrate my machine before taking on this project. I'm using the springs mentioned in the README, cut to protrude about half an inch when installed into the magazine. I've also tried adding more spring to make the magazine stiffer, with no luck.

Has anyone experienced this before? Are there any secondary options for HD22 magazines that may perform better? Thanks in advance.

Anyone gone with max arms steyr kit over the sme kit. Obviously more expensive but description is minimal compared to the key parts kit. Just want to make sure the steyr kit has everything i need. Dont want to go chasing down individual parts if I can help it.

Have tried reaching out to them via email and instagram and have gotten nothing back over last week or two.

thanks for your help

Just a bit of progress gonna color match the upper and handguard to the lower once it is all done. Its gonna be a 22lr

I am just looking for a new mag that I can get for cheap

Is there any way to use other materials like lead powder, whey, even sand?

I made some handstops with Pa-612cf i regret ever trying to print with anything other then CF nylon ... polymaker is so easy

Looking for a Glock Carbine , preferably one that I could just slap a Glock slide onto it , not looking for one where I need to have a complete Glock then drop it in