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Old 06-22-2013, 07:16 PM   #1 (permalink)
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3D printed SMG stripper clips

Just a little side project.


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Old 06-22-2013, 07:58 PM   #2 (permalink)
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Looks great!

So are you having to hone the bore or are the ribs not a problem?

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Old 06-22-2013, 09:05 PM   #3 (permalink)
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I think I see ribs... Also, what's cost per unit look like?
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Old 06-22-2013, 09:28 PM   #4 (permalink)
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I have not had a chance to test function yet. I did not include the ribs (I'm assuming you are referring to the raised lines to hold paint in the originals). I just made the bore tighter to hold today's smaller paint. Still in the prototyping phase for sure. I plan to play around with ribs vs no ribs, bore size, and finish (layer thickness and/or vapor polishing). For this one I used a bore of .670 and a layer height of .33mm, no other finishing.

Cost, I'm not sure. Material wise, the ABS I'm using is $10 per pound, this took about 50 minutes of printing time (but can probably be improved), very little material.
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Last edited by Jackson; 06-22-2013 at 09:31 PM.
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Old 06-23-2013, 12:26 PM   #5 (permalink)
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That's cool. It's funny because I was just talking to somebody about injection molding these.
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Old 06-23-2013, 01:54 PM   #6 (permalink)
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If somebody can get these injection molded, you have a business partner. That would give me a great deal more enthusiasm for getting back on top of the 68 conversations.
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Old 06-23-2013, 05:04 PM   #7 (permalink)
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OK first the link:
VintageRex.com | Elite Enterprises

The thought I have is to use a similar looking set up, but only one ring, no refilling. This would be for feeding First Strikes.. Making most of the set up, spring, shell are in my skill set. It is the carrier ring that had me stumped. How big a connected ring, a circle, is possible?
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Old 06-24-2013, 11:02 AM   #8 (permalink)
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May as well adapt an FN303 magazine into anything full auto. The problem with adapting a drum to an SMG is that you would need individual shells to hold individual paintballs. Otherwise the SMG pawl mechanism wont work, you'd need some kind or bolt system, and may as well start with a 68 Special instead.

But to answer your question about the ring, you can cut virtually any size within the work envelope of your machine, so long as you can hold it without crushing it.
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Old 06-24-2013, 12:30 PM   #9 (permalink)
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Quote:
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May as well adapt an FN303 magazine into anything full auto. The problem with adapting a drum to an SMG is that you would need individual shells to hold individual paintballs. Otherwise the SMG pawl mechanism wont work, you'd need some kind or bolt system, and may as well start with a 68 Special instead.

But to answer your question about the ring, you can cut virtually any size within the work envelope of your machine, so long as you can hold it without crushing it.
The fn mag is a good idea it wouldn't need the pawl either. I would think an smg has enough air force to push a ball out of a fn mag but a gun with a bolt is a better option still, but more difficult. The fn bolt is about 1/2" longer than a regular mag bolt and has a longer throw.
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Old 06-24-2013, 01:15 PM   #10 (permalink)
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I've kicked some ideas around of a drum mag based on the Thompson SMG drum mag design. It is similar to the Destroyer design above, except the rotating wheel has arms that hold groups of 5 rounds instead of individual rounds. The design could be adapted to a gun with a bolt. It would be a fairly effective design as only the 5 rounds at the top are under direct spring pressure at any given time.

Also looking at the drum magazine design from the SMG-60 patent. I'm working on a design that could be simply bolted on to an existing SMG-68, with redesign curved stripper clips.
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