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Old 08-08-2013, 05:36 PM   #11 (permalink)
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Nice info. Some clarification on seals....

Quote:
First, all the seals (except the brass nut seal in the valve) can be found at a hardware store. The o-ring sizes are as follows:

Valve and pierce pin assembly body: #114 or #113
Front valve seal: #009
Bolt: #111

Note: You are looking for AS568 o-rings.
Those sizes are about right but you do have to note that the upper tube assembly is larger than the lower assembly. So... you could go with a 114 as the uppers and 113s as the lower ones. Those sizes will be pretty difficult and some folks have found that going with a size smaller on each (113 and 112) works fine and is easier to install without tearing.

I don't necessarily agree about availability at the hardware store. You also have to look at material type and durometer. The internal valve "magic o-ring" was urethane from the factory. Probably 70d. I've seen a mix on the valve body and 12g body o-rings but I believe those were urethane as well from the factory. Buna N or Viton might be a decent alternative. EPDM o-rings are pretty common as well but should probably be avoided.

The seal that goes in the brass valve seat is proprietary. No good alternative other than factory stock or custom made. I don't see the 12g face seal listed. Those are not a flat seal or o-ring so the only source for replacements is factory stock seals.

Also probably worth mentioning Maj Tom's youtube videos on the gun. If you expand the info, the o-ring size info and some other details are there as well.
Brass Eagle Nightmare Disassembly Part 1 - YouTube
Brass Eagle Nightmare Disassembly Part 2 - YouTube


Final note... not all nightmares are the same internally. The more common internals (later?) are shown in the pics. The earlier ones only had one outer o-ring on one of the assemblies....the upper / 12g assembly I think but I'd have to look at home....
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Old 08-09-2013, 07:56 AM   #12 (permalink)
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Good points. I'll be updating the thread shortly. I myself have found that the listed o-ring sizes are available at a hardware store. There commonly composed of Buna-N, so they should be fine. Thanks for the info.
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Dye says that they're going to make a 'Faultline Broomstick' soon, so wait for that, then you'll never be outshoot, unless the other guy has a full-auto ramping Boo-Ya frame on there Spider and a Dye Broomstick, then your screwed, you mite as well play Airsoft.
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Old 08-11-2013, 11:08 AM   #13 (permalink)
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The thread has been updated. Anything more to add?
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Originally Posted by THE-SHOOTIST View Post
Dye says that they're going to make a 'Faultline Broomstick' soon, so wait for that, then you'll never be outshoot, unless the other guy has a full-auto ramping Boo-Ya frame on there Spider and a Dye Broomstick, then your screwed, you mite as well play Airsoft.
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Old 08-29-2013, 01:59 PM   #14 (permalink)
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This thread has been incredibly helpful, I got my Nightmare up and working and also now have approximately 600 extra O-rings for it. Thanks McMaster Carr.

One quick question though...I put a #114 on the pierce pin assembly as that was where the problem was, and I quickly realized that #114 is WAAAAAAY too big to get it back in there, and then put a #113 on it and that was still pretty big and I ended up tearing it a little in order to get it in (however it still works with no leaks...plus I've got plenty of extras). So my question I guess is on whether the explanation of O-ring sizes is correct. It states:

"Valve and pierce pin assembly body: #114 or #113 for the upper and lower tubes, respectively (Some have found #112 and #113 to work, while reducing the risk of tearing)"

So according to this, #114 is for the upper tube (pierce pin assembly) and #113 is for the lower tube (valve)? Or is it that the "valve and pierce pin assembly body, respectively, take #114 and #113" meaning that the valve is #114 and the pierce pin is #113?

I guess its more of semantics and grammar than a technical question...
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Old 08-29-2013, 10:16 PM   #15 (permalink)
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Maj Tom documented it in an easier way to read:
114 - Pierce Pin Assembly exterior/ 12g plug
113 - Exterior of the Valve Assembly

Myself and others have successfully used one size down for those o-rings to make the assemblies easier to install and reduce tearing... eg..
113 - Pierce Pin Assembly exterior/ 12g plug
112 - Exterior of the Valve Assembly
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Old 08-30-2013, 02:02 PM   #16 (permalink)
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Quote:
Originally Posted by schuby View Post
This thread has been incredibly helpful, I got my Nightmare up and working and also now have approximately 600 extra O-rings for it. Thanks McMaster Carr.

One quick question though...I put a #114 on the pierce pin assembly as that was where the problem was, and I quickly realized that #114 is WAAAAAAY too big to get it back in there, and then put a #113 on it and that was still pretty big and I ended up tearing it a little in order to get it in (however it still works with no leaks...plus I've got plenty of extras). So my question I guess is on whether the explanation of O-ring sizes is correct. It states:

"Valve and pierce pin assembly body: #114 or #113 for the upper and lower tubes, respectively (Some have found #112 and #113 to work, while reducing the risk of tearing)"

So according to this, #114 is for the upper tube (pierce pin assembly) and #113 is for the lower tube (valve)? Or is it that the "valve and pierce pin assembly body, respectively, take #114 and #113" meaning that the valve is #114 and the pierce pin is #113?

I guess its more of semantics and grammar than a technical question...
I'll fix that. Sorry for the confusion. Some people recommend #114's for the upper tube and #113's for the lower. Or, if those are too large, #113's for the upper and #112's for the lower.
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Originally Posted by THE-SHOOTIST View Post
Dye says that they're going to make a 'Faultline Broomstick' soon, so wait for that, then you'll never be outshoot, unless the other guy has a full-auto ramping Boo-Ya frame on there Spider and a Dye Broomstick, then your screwed, you mite as well play Airsoft.
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Old 08-30-2013, 04:05 PM   #17 (permalink)
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It looks like I posted up the wrong sizes from my McMaster order.

I'll get that fixed on the video.
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Old 08-30-2013, 11:14 PM   #18 (permalink)
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Crosman End seal 357/CO2 guns. Crosman, Benjamin, Sheridan.
crosman co2 cartridge seal, same as nightmare.
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Old 09-01-2013, 07:39 PM   #19 (permalink)
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As in #114 and #113 are too large? I ended up jumbling around the numbers... or did you use #113's and #112's?
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Quote:
Originally Posted by THE-SHOOTIST View Post
Dye says that they're going to make a 'Faultline Broomstick' soon, so wait for that, then you'll never be outshoot, unless the other guy has a full-auto ramping Boo-Ya frame on there Spider and a Dye Broomstick, then your screwed, you mite as well play Airsoft.
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Old 09-01-2013, 07:41 PM   #20 (permalink)
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Quote:
Originally Posted by mustangii View Post
Crosman End seal 357/CO2 guns. Crosman, Benjamin, Sheridan.
crosman co2 cartridge seal, same as nightmare.
Awesome! I'll update the thread.

Airguns do have a lot in common with paintball markers. Heck, that's where paintball markers came from!
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Quote:
Originally Posted by THE-SHOOTIST View Post
Dye says that they're going to make a 'Faultline Broomstick' soon, so wait for that, then you'll never be outshoot, unless the other guy has a full-auto ramping Boo-Ya frame on there Spider and a Dye Broomstick, then your screwed, you mite as well play Airsoft.
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