Mod Shop – Conduit Breech

Good evening everyone!

Aight, so I’ve been a little lazy on the blaster front recently and haven’t actually done any modding for a good few weeks. This has unfortunately meant that I’ve eaten up pretty well all of my pre-prepared content and have had to go out and actually do something. Today’s post is something I’ve been thinking about for quite some time but never really got around to doing. Given that I objectively needed something this week, I decided to give it a crack.

The idea here it that it’s a slide action breech that accepts standard Nerf streamlines in standard Nerf clips. In my case it was intended for a blaster that already had a 20mm conduit coupler on it, so the end on this breech is therefore 20mm conduit. However, if you were to permanently attach it to a blaster or aim to use a different coupler, I’m sure you can figure out how to do that.

Also I need to give a should out to Acerised’s thread on OzNerf that came up with a really easy way to get it back to a 20mm end.

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Tools/Materials needed

16mm conduit
20mm conduit
15mm PCV
15mm PVC coupler
Hot glue + gun
Electrical tape
Knife
Dremel with cutting and grinding attachments
Hammer/mallet
Heat gun
Drill with coat-hanger sized bit
Coat-hanger
Permanent marker
PVC solvent

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Start by cutting a 5cm length of both 16 and 20mm conduit.

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Grind down a little of the outer edge of the 16mm conduit.

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So you can start to insert it in the 20mm conduit.

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Then hammer it in as far as you can.

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Like so.

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Then cut the exposed 16mm conduit flush.

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So it looks like this.

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Grab some 15mm PVC, warm it up with a heat gun and insert your nested 16/20mm conduit, 16mm end first. Once the PVC cools, pull the conduit out, cover it in solvent and reinsert.

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Drill a small hole right the way through all three sections of pipe.

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Cut a section of a coat-hanger and insert it through the hole.

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This will act as our dart stopper.

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Bend the coat-hanger around the outside and trim it to length.

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Fill the outside with hot glue to seal the holes.

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Grab a 6 clip and press it over the PVC pipe, a little forward of the dart stopper. Draw around where it touches.

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Remove the clip and you should end up with something like this.

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Then fill in the middle.

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Cut a piece of 16mm conduit to be your barrel. The length of which is entirely dependent on the blaster you intend on using it on. In this case I ran with 300mm.

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Move to one end of the conduit, grab a knife and gradually carve out the inside to make a funnel.

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Like so.

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Place the barrel piece next to the outer breech we cut earlier. Mark a spot on the outer breech, with enough length still infront of it to allow a decent chunk of the barrel to be exposed.

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Cut the outer breech at said mark,

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Slide the barrel in as far as it goes.

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Measure up another piece of PVC so that it’s a little longer than the exposed barrel.

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Cut again at said mark.

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Ok, now that all the parts are here, lets test it before we go any further. Grab a 6 clip again and fill it with darts.

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Slide the barrel all the way in and insert the clip.

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Slide the barrel far enough forward that a dart gets pushed up by the clip.

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Slide the barrel all the way back.

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Now, pull the barrel out and check to see if the dart loaded. Success!

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Remove the dart and try again.

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Slide the barrel all the way back.

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Pull it out and hopefully it’s grabbed another dart. In this case the dart was actually far enough in that you couldn’t see it, so I pulled it out a little so you could see.

If it’s not loading correctly, try smoothing out the funnel on the end of the barrel or check the dart stopper.

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All right, now that we’re satisfied that it works, lets continue. Grab a 15mm coupler.

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Glue it to the end of the outer breech.

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Run a bead of hot glue near the outer end of the barrel.

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Then push the piece of PVC we cut earlier over the top of it. The barrel needs to be as far back as it can go, and the new PVC should be nesting neatly in the coupler.

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Let it dry, then remove the barrel.

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Run another bead of hot glue, this time around the back end of the barrel outer and the barrel.

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Reinsert the barrel and check your clearances.

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Pulling it in and out of the coupler should be relatively easy.

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Works? Good.

Pull the barrel right the way out.

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Wrap a few layers of electrical tape around the back end of the barrel.

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Test that it fits in the breech. This part will be incredibly particular. You need to get the seal as tight as possible, but still allowing movement. Easiest way to do this is to stick a finger down the end of the barrel to jam it, then blow down the end of the conduit. If there’s lots of air escaping, the seal isn’t good enough. Trial and error here people.

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There we have it. One homemade, N-strike clip accepting breech. You can now but this on anything from a Triple Shot, through to a Titan; whatever floats your boat. The seal will never be perfect so ranges will never be as good as a singled barrel, but reloading sure is a hell of a lot easier.

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