7 replies to this topic

[Glint]

I have a couple questions about the functioning of breeches. More importantly, how to get mine working well and how it should.

So first off, let's say I'm working with a pull breech. How do I keep it do I can't pull the inside barrel material all the way out of the outside material?
And how do I make it so that the inside material can't twist and turn when jiggled around, in case you open the breech and the slot/opening isn't facing the way it's supposed to?

And thirdly, what advantages does a breech have over a speed-loader?

[Fresh]

If you don't want the actual barrel to come outside of the breach you can put a piece of pipe on the spot of the barrel where it is in the slot. You could also cut a slot higher up in the actually casing and put a tab on the barrel. This way the tab will not allow the barrel to go past the slot, stopping the barrel from coming out. In my experiences I've never had a problem with pulling out my barrel during a war. Mine don't have anything to stop it. To get the inside material not to move around is different depending on what kind of breach. With a brass breach, for example 17/32. It is usually nested in 19/32. The 19/32nds is stationary and is held in by electrical tape and superglue/epoxy. With a PETG breach, the barrel is usually floating around in PVC and is pushed onto a piece of 17/32 brass to achieve an airtight seal. To keep the PETG barrel straight, it is usually wrapped in electrical tape to be a good fit, but not too tight. This keeps the barrel straight and easy to slide. With a speed loader you have to put the barrel into a coupler. It can get annoying especially if you cant see the coupler like on a singled AT2k. Also with PVC speedloaders, I find them annoying to flip because they take more force to remove from couplers because of a tighter fit than CPVC speedloaders in CPVC couplers. Lastly, a speedloader is a lot easier to make.

[BritNerfMogul]

I have a couple questions about the functioning of breeches. More importantly, how to get mine working well and how it should.

So first off, let's say I'm working with a pull breech. How do I keep it do I can't pull the inside barrel material all the way out of the outside material?
And how do I make it so that the inside material can't twist and turn when jiggled around, in case you open the breech and the slot/opening isn't facing the way it's supposed to?

And thirdly, what advantages does a breech have over a speed-loader?

I'll take this one.

A1 - to stop the moving part of your breech coming out, I would suggest glueing a section of the outer pipe to it as a block.

A2 - This should also stop any twisting, as long as the piece is big enough.

A3 - The advantage of these breeches is that a grav clip can be fitted relatively easily, increasing ROF.

Hope this helps.

EDIT - Shit, Fresh beat me to it.

EDIT 2 - Pic to help



Green = Barrel material
Blue = Outer breech material
Red = Stefan Dart

Edited by BritNerfMogul, 19 June 2009 - 05:37 PM.

[Glint]

Alright, thanks guys. Currently I'm working with PETG nested in SCH40 PVC, so it takes a wrap and a half to 2 wraps around the PETG of electrical tape to make the seal.

Thanks for the good diagram Brit, that helps a lot.

[BritNerfMogul]

Alright, thanks guys. Currently I'm working with PETG nested in SCH40 PVC, so it takes a wrap and a half to 2 wraps around the PETG of electrical tape to make the seal.

Thanks for the good diagram Brit, that helps a lot.

Not a problem. Good luck with your breech.

[alextwin007]

I found it easier to just attach some fishing line of a certain length to both parts of the breach. Also at BCNO Diamondback and I talked about the difference between a breach and a speedloader and the main thing is that it’s easier to load a breach when running.

[CaliforniaPants]

If you use the pipe cutters that you twist and turn (I cant think of a better way to explain them) to cut the pipe with then it leaves a little lip on the inside of the SCH40, making it so that you wont accidentally yank out the petg.

This was a little hard to explain the way I wanted.

[TantumBull]

http://nerfhaven.com/forums/index.php?

Edited by TantumBull, 15 May 2009 - 09:32 AM.