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-   -   So I found a BE Nightmare LB Comp at a gun show and it doesn't hold air (http://www.mcarterbrown.com/forums/ask-experts/232804-so-i-found-nightmare-lb-comp-gun-show-doesnt-hold-air.html)

DarkNinja 05-05-2013 02:26 PM

So I found a BE Nightmare LB Comp at a gun show and it doesn't hold air
 
2 Attachment(s)
I found it sitting next to a few shotguns and rifles and asked the kid behind the table if it worked, of course he said yes. Its a LB Comp but the feedneck is missing, not a big deal since I can still use the stockclass feed tube. I get it home and put a 12g in it and it dumps it in seconds. Apparently it doesn't work... not a big deal since its in pretty damn good shape and the price wasn't terrible. Of course I tore it down immediately and then hopped on here and found out that's a bad idea. Still leaks after reassembly, I see that I should de-bur the lower tube, whats the recommended way? Orings I can find but I see that the main seals in the valve are a problem, is there anyone around that can point me in the right direction?

A feedneck would be awesome but thats not a big deal unless I get this thing running. Honestly I might just put a sight rail over the hole and use it in stock class form if I can get it going.

Obligatory pics:

snaparen 05-05-2013 02:53 PM

Wow that is in beautiful shape! I am curious to know what you got it at.
Mad made a attempt at making some seals for these awhile back, not sure what the final out come was. Try and pm him, great guy to work with.

Pyrate Jim 05-05-2013 07:50 PM

It's an LB Comp, with the cut-out for the 12g.

Nightmares only lived up to the name when you had to fix 'em.
But there's an old-school trick for putting them back together.

You need what Machinists call Brass Shim-Stock.
You wrap the valve assembly with 0.015 Brass, lube it up well and slide the wrapped valve through the threads of the body, then pull the brass "sleeve" out.

No Mercy Ever 05-07-2013 12:54 AM

One thing, if you want to play stock class with this, look into something that can fit over the top tube opening and slide back and forth. I played with one that I picked up a month ago. Didn't leak, surprisingly, but having to unscrew the feed plug, on a LB, load, and then close it can be a bit involved. That hole will make reloading easier. I am not sure about Mad having made any seal kits. I think that there was a crucial seal that he could not replicate.


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