12 replies to this topic

[umpshaplapa]

This has to be the most simple way to make a CPVC breech yet. I was messing around with some 21/32 brass that I had lying around, when I spotted some random cpvc. Just for fun I slid the brass over the CPVC and to my suprise it fit perfectly. I immediatly tested if it was air-tight, and it was, so I made a breech.

It took all of 4 minutes.



I slid the brass along until I found the closest point to the end of the CPVC that was still air-tight. *I forgot to add in room for the coupler, if you do this add that in!* I then marked that length and cut a half pipe with my dremel. I put it in my SNAPbow and didn't feel any significant loss of force when I shot the gun.

[minsc]

So you were just messing around with that 21/32 in. brass eh? Whatever floats your boat man.

On topic, that seems like a really easy way to make a breech, so nice job. However, what brand of CPVC did you use? I know they differ in size between brands and maybe even batches because some will fit into PVC while others will not.

[Soothsayer]

Simple and effective. I like it. Add a bit of whatever glue or like scotch tape around the dart opening may be a good improvement I could see, but that's just if someone's CPVC doesn't quite fit the bill.

[Galaxy613]

Hehe, I did something like this only with PETG and Ducttape at my first DCNO (Spring '08) It worked very well. Seems like I only have one picture of the breech:



Basically, I got medium walled PETG, cut it down one side, slid it over CPVC, wrapped duct tape over it, and used it just like yours.

[Galaxy613]

My first double post in like, forever... sorry about it.

Edited by Galaxy613, 04 March 2009 - 10:08 PM.

[umpshaplapa]

So you were just messing around with that 21/32 in. brass eh? Whatever floats your boat man.

On topic, that seems like a really easy way to make a breech, so nice job. However, what brand of CPVC did you use? I know they differ in size between brands and maybe even batches because some will fit into PVC while others will not.

Dude...nasty.

I made this out of home depot CPVC, but I tested it with some cresline stuff I'm pretty sure I got at Ace and It was just as air-tight.

Edited by umpshaplapa, 04 March 2009 - 10:12 PM.

[BlackFox]

Have you got any spare At2k pump tubes? Those fit perfectly over CPVC if you wanted it to look a little more congruous.

I've got a ton from 2k's with broken check valves. I just don't use CPVC.

[BlackFox]

Piss. First double post... ever. Ignore, sorry.

Edited by BlackFox, 04 March 2009 - 10:31 PM.

[legacy179]

A problem that I have had with cpvc breeches is that when you do not push the dart all the way forward until you can not see the dart in the breech opening, when the air comes, instead of pushing the dart through the barrel, it will sometimes cause the dart to be squished forward, causing it to expand temporaily and not get all the way through the barrel.

[umpshaplapa]

I just push the dart into the front of the whole. Maybe your barrel was to long.

[Quilan Fett]

Used one of these in my shotgun. Link in sig.

[Shrub]

So it's 3/4",1/2" CPVC and 21/32" Brass correct? If not could you show how to put the parts together I don't need to know how to cut the breech I can do that. Well good job anyways. So I think you should put some thing that you can just pop the dart in and close the breech without even having to push the dart in manually I do this to my brass breeches and it's very effective. I would add eletrical tape at the bottom tip to make a seal.

Also Home Depot cpvc is way to small cpvc it is Genova but, it's their Flow Guard Gold so it has a smaller inner diameter due to thicker walls (no duh). Maybe your Home Depot hes regular Genova I don't know but just a heads up on the CPVC other wise your darts will tear and and shrink (if they don't tear) over short periods of time. Cresline is good but if you have BlackSunshine or Hereticorp darts or some bodies foam of similar size it will be hard to put the dart in there.

Edited by Longshot Wielder, 05 March 2009 - 08:24 AM.

[umpshaplapa]

So it's 3/4",1/2" CPVC and 21/32" Brass correct?

No. It's just 1/2" CPVC with a slot cut in it, and the brass.