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2 Methods For Barrel Extension

retractable and one c/o chap stick

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#1 ambushbug

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Posted 22 February 2006 - 08:50 PM

I've been playing around with different ideas for adding brass barrel extensions for my blasters. I've used the coupler (nesting 9/16 over a 17/32 stub) method but I find that its a little slow and the 9/16 barrels sometimes fly off. I also don't like carrying a bunch of extra barrels around.

I came up with a method for adding a little more barrel to my muzzle-loading blasters without slowing reload times. A 9/16 piece which retracts (via a spring) when loading and automatically slides forward when firing.

I added this to an SM750 I recently found at a local thrift shop:


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I added some e-tape around the cpvc for a tight fit.
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The spring was an air restrictor from an SM3K (I think)
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I had to sand out some of the inner diameter of the orange ring in the blaster chassis.
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to be continued (image limits)...
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#2 ambushbug

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Posted 22 February 2006 - 08:57 PM

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I cut out the trigger guard to make more room form my hand -tiny handle!
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This is the barrel at full length.
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This is the barrel retracted.
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Again, because this is a muzzle-loaded blaster, I couldn't make the 9/16 piece very long so I only get anothr 2.5-3inches of extension. Not much, but it can't hurt. I can't do any official range testing (and my basement is in shambles) but it does seem to add a few extra feet. I'm thinking about using springs for my next nested brass/breech barrel.


to be continued (chap stick barrel) ...


[edit: I forgot to mention - I plugged the pump as usual - the general aspects of the mod was adapted from Cxwq's on the mod directory)]

Edited by ambushbug, 22 February 2006 - 09:15 PM.

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#3 ambushbug

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Posted 22 February 2006 - 09:12 PM

I also realized that the plastic tube for my used lip-balm (actually Burt's Bees - not Chap Stick) is also a good tight fit for my micros. Furthermore, the cap fit nicely over a 9/16 brass tube. This means that when the tube is "capped", the barrel extension clicks into place and no more barrel extensions flying/sliding off.

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the nice thing is that the yellow tube has a hole in the base that is of narrower diameter (so that the darts cannot be "sucked" backwards towards the plunger - though the tight fit would probably prevent it anyway). Another plus, is that the tube fits perfectly into a 1/2" CPVC coupler. It stays in place even without glue (I did anyway).
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This barrel is currently being used on my MaxShot (below) and my ERTL FS1010 (not shown).
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Again, no official range testing but I think it suffices to say that it works well. The only thing is that the brass can't be too long (e.g. the full 12") or its weight makes the cap/barrel somewhat crooked.

Nothing revolutionary but just some new fodder for the mod-idea mill.

*Sorry for the virtually non-existent write-up (I'm in a rush) but I think you guys can figure it out from the pics alone.
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#4 MysticNinja

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Posted 23 February 2006 - 01:03 AM

Nice mods with lots of pics.
(Though I really only clicked this thread 'cause I assumed there’d already be penis jokes)
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