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Adjustable barrel spacer for bullpups

Lazy precision
bullpup concept parts

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#1 T da B

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Posted 20 August 2014 - 03:52 AM

Sup guys,

Here's a little something I whipped up to keep the barrel stable on my bullpup. It takes the guesswork out of fabbing your spacer by hand, and it looks pretty nice. I didn't make the big piece quite tall enough, but you get the idea:

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Edited by Aeromech, 23 November 2015 - 02:46 AM.

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#2 Zorns Lemma

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Posted 20 August 2014 - 05:30 AM

Since there are now more axes for it to rotate on and become misaligned, doesn't this defeat the purpose of a spacer?
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#3 Drev

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Posted 20 August 2014 - 10:05 AM

Since there are now more axes for it to rotate on and become misaligned, doesn't this defeat the purpose of a spacer?

If it's screwed tight enough, I believe this would act as the 3d printed barrel spacer that I used on this design. The locknut on the other end makes me think that this could indeed be screwed very tight. It can still shift from side to side, but mine sometimes did that too and it was no problem when using it at a war.

I think this adjustable barrel spacer is a great idea because it was a pain to find out exactly how far apart the barrel and the plunger tube were from each other. I went through five or so designs before it fit the right way. My advantage was that I was using a 3d printer. If I had to machine those five designs, I probably would have given up. Once again, I really like this.

Edited by Drev, 20 August 2014 - 04:38 PM.

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#4 Meaker VI

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Posted 20 August 2014 - 10:20 AM

I don't see why it wouldn't be possible to use that as a template to make a single-piece barrel spacer? Clamp the pieces together once they're in place on the blaster, trace, then make a (superior) one-piece unit?
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#5 Xellah

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Posted 20 August 2014 - 11:01 AM

The problem with making barrel spacers doesn't come down to finding the distance from the plunger tube to the barrel. As long as you set a distance, say 1" or so, you can machine two identical spacers and rest your barrel inside of them. Then you just modify your elbows to accommodate for the height of the barrel and you're set.

It is much easier to modify your elbows than machine a spacer to match them. Using two spacers is the easiest way to achieve level barrel spacing.
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it cant be as bad as reloading an ak-47 on the run




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