3D Printed Adjustable 12 GA Snap Cap

[HasegawaYamato]

Just got myself a lovely 3D printer recently, and here is my first project with it
A 12 GA 2-3/4 with two extension block to make it either 3 or 3 half, fixed with a random M5 bolt came with my printer as spare, poured in some hot glue to protect the firing pin, seems work well with my shotguns, so I guess I dont need spend anymore dollars on snap caps

 

[1ABNDT]

Just got myself a lovely 3D printer recently, and here is my first project with it
A 12 GA 2-3/4 with two extension block to make it either 3 or 3 half, fixed with a random M5 bolt came with my printer as spare, poured in some hot glue to protect the firing pin, seems work well with my shotguns, so I guess I dont need spend anymore dollars on snap caps

That's some excellent stuff, would you be able to create some chamber flag plugs. Would be interested in a design that leaves the action open a little bit, would've great for my shotgun, 9mm handgun, and .308.

Something like this design in different calibers

https://images.app.goo.gl/QEuHtsBJkAzQk5GM9

And this but like the ones on the left in the picture, not interested with the ones on the right.

Let me know what you think is possible I would be interested in that type of design in calibers of 12gauge, .308, 9mm.

https://images.app.goo.gl/2W6wu5NUWSQzaqtt5

https://www.plugrusa.com/project/nordic-components/

 

[Crazy Cory]

I have a huge pile of gun cad files if you'd like them.
All the file defense distributed had just before the fbi took them down. Plus a few others

 

[Falconflyer]

That's pretty cool.
Is the finish as rough as it looks in the picture or is that just the camera making it look that way?

 

[bertn]

How is the rim holding up cycling a number of times?

 

[HasegawaYamato]

Let me know what you think is possible I would be interested in that type of design in calibers of 12gauge, .308, 9mm.

It is possible for sure, the only problem is that 3D printed stuff isnt that strong, so if the bolt slapped onto it accidentally, the risk of damage the plug is high.

 

[HasegawaYamato]

I have a huge pile of gun cad files if you'd like them.
All the file defense distributed had just before the fbi took them down. Plus a few others

I will like them for sure! Thanks in advance!

 

[HasegawaYamato]

That's pretty cool.
Is the finish as rough as it looks in the picture or is that just the camera making it look that way?

The problem with 3D printing is that the part is built in layers, thats wahy the surface looks rough. A little bit sanding will solve the problem but I dont think it worth the effort for snap caps lol

 

[HasegawaYamato]

How is the rim holding up cycling a number of times?

It depends on the setting when print, I tried quiet a few different set ups, some of them hold the shape even when I cycle the gun really hard, but some of them do snaps off pretty easily. Im still trying to get the best outcome.

 

[JohnnyPython]

Great job!

Remove the script on the side. That might make the print smoother.

Not sure what printer you have, but reinforcing the frame and mounting the printer will increase quality. Reinforced belts help too.

Infill % and stricture will strengthen cylindrical parts and will not snap. 15-20% is usually a good start. Try decreasing the speed and increasing the nozzle temp.

 

[1ABNDT]

It is possible for sure, the only problem is that 3D printed stuff isnt that strong, so if the bolt slapped onto it accidentally, the risk of damage the plug is high.

Didn't realize they were that fragile. Ty, great work keep us updated on your projects.

 

[HasegawaYamato]

Great job!

Remove the script on the side. That might make the print smoother.

Not sure what printer you have, but reinforcing the frame and mounting the printer will increase quality. Reinforced belts help too.

Infill % and stricture will strengthen cylindrical parts and will not snap. 15-20% is usually a good start. Try decreasing the speed and increasing the nozzle temp.

Thx for the advises! I tweaked the bottom layer thickness for a bit and adjust the rim shape a bit, now it wont snaps that easily when cycling hard!

 

[HasegawaYamato]

Didn't realize they were that fragile. Ty, great work keep us updated on your projects.

I dont have any semi 12ga or 308, so I tested some testing bolck using my garand. The lower infill rate setting results a catastrophic failure if u let the bolt slamp onto it freely, it gets better with higher setting but there still gonna be dents everywhere. Im using ABS as the material, perhaps tougher material like PC will work Pics blow showed the difference

 

[Juster]

Looks good! I sometimes cut the brass off a spent round and epoxy on the 3D printed bit, so I can cycle it through the action without breaking.

 

[1ABNDT]

Interesting. R&D is fun.

 

[somethingspecial]

Reusing the old brass is a good idea. Good thinking,

 

[JohnnyPython]

Looks good! I sometimes cut the brass off a spent round and epoxy on the 3D printed bit, so I can cycle it through the action without breaking.

Perhaps you can slip the 3D printed part inside the hull. Then cut the crimp section off. Then there’s no fear of the two parts separating.