5 replies to this topic

[ultimatenerf 320]

This write-up is for my other breech, which can also be used with higher-powered guns. I personally like this breech better.
Materials:
-Super glue
-1/2 X 5/8 butyrate
-PVC
-CPVC
-Sandpaper
Tools:
-Pipe cutters/hacksaw
-dremel
-ruler/omnigird

First, cut your PVC to about 7 1/4 inches long:


Then, cut the breech slot starting from 1 1/4 inches of the end, cutting it about 4 1/2 inches long:


Cut a piece of your butyrate to about 9 1/2 inches:


Attach a piece of PVC that is 2 3/4 inches long to your butyrate: (may need to sand down your butyrate to slide smoothly)


Insert your barrel, and super glue on your nub, I used a piece of the cut out breech slot for this step:


And for your last step, add a small piece of CPVC to the back of your breech: (mine was about 1/2 inch long)


And you should be done! I hope this breech doesn't have nearly as much confusion as the other one. Final Product:


No, I have no other dimensions for a smaller breech.

Questions? Comments? Flames?

[Maeric]

How is this any different from the many other PVC/PETG breeches?

[ultimatenerf 320]

1/2 X 5/8 butyrate has the same ID as CPVC, but has a slightly less OD so it slides in PVC. PETG is for larger sized foam or air gun fit, with most foam this has a tight fit.

[Zorns Lemma]

1/2 X 5/8 butyrate has the same ID as CPVC, but has a slightly less OD

But in your other thread you put CPVC inside 5/8x3/4" butyrate tube, so either your 5/8" ID butyrate tube lies to you and isn't 5/8" ID or your 5/8" OD butyrate tube lies to you and isn't 5/8" OD.

But either way talking butyrate holy shit!!!

Or maybe your cpvc changes dimensions.

Magic CPVC holy shit!!!

P.s. in case anyone is wondering what kind of magic PVC this guy is using, if you go to Home Depot and buy the 1' sections of 1/2" PVC instead of the 10' pieces, you pay $$$ more, but get PVC that's very close to .625" ID instead of more common .596-.604" ID. This probably isn't true for every home depot everywhere, and the manufacturer probably isn't exclusive to home depot, but I've seen this particular PVC make in multiple HDs in IL and the on HD we checked in NJ.

[ultimatenerf 320]

1/2 X 5/8 butyrate has the same ID as CPVC, but has a slightly less OD

But in your other thread you put CPVC inside 5/8x3/4" butyrate tube, so either your 5/8" ID butyrate tube lies to you and isn't 5/8" ID or your 5/8" OD butyrate tube lies to you and isn't 5/8" OD.

But either way talking butyrate holy shit!!!

Or maybe your cpvc changes dimensions.

Magic CPVC holy shit!!!

P.s. in case anyone is wondering what kind of magic PVC this guy is using, if you go to Home Depot and buy the 1' sections of 1/2" PVC instead of the 10' pieces, you pay $$$ more, but get PVC that's very close to .625" ID instead of more common .596-.604" ID. This probably isn't true for every home depot everywhere, and the manufacturer probably isn't exclusive to home depot, but I've seen this particular PVC make in multiple HDs in IL and the on HD we checked in NJ.

Thats because nobody and nothing is perfect. I Measured the ID of the PVC and 5/8 X 3/4 butyrate with calipers:
PVC: .615
Butyrate: .625

OD of CPVC and 1/2 X 5/8 Butyrate:
CPVC: .624
Butyrate: .615

So they match up fine. And Some people in the IRC chat room told me to make an "all clear breech" which is very hard with this type of material. I couldn't find a way to seal it.

Edited by ultimatenerf 320, 11 August 2010 - 11:34 AM.

[Talio]

Holy mother of god. Please stop making breech threads dude.