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Old 09-22-2013, 02:12 PM   #1 (permalink)
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Nightmare Co2 plug dimensions

This info might not be a bad thing to sticky, or transfer it into the nightmare sticky. I need a feed plug for my aluminum LB, so I took the dimensions of the Co2 plug since the threads are the same.

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This pic shows the 12g cup on the end of the plug.

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As for the feed plug, I do not have one to measure. Although from the few pics I have seen, the knurling looks to be no more than 3/16 inch in length. The thread length should be a bit shorter than the feed plug threads as well. Maybe 1/4 in to 5/16. That is a judgement based on screwing my co2 plug into the feed plug threads. The threads bottom out in the gun leaving the gap visible between the threads and the knurling.

*** On the outside chance that these threads are actually metric, The closest I could get would be 22.50mm by 1.25 thread pitch. The thread pitch gauge seemed to mate up slightly better with the 20 tpi though. Thread diameters were measured with a digital micrometer. To 7/8 in threading measured up to .880 inch. 7/8 = .875. The metric equivalent was about the same off from the assumed size. Oh, and I am an auto tech, not a machinist
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Last edited by pghp8ntballer; 09-22-2013 at 02:16 PM.
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Old 10-06-2018, 10:04 AM   #2 (permalink)
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You are amazing. I need a CO2 plug made for my Aluminum Nightmare LB and this is going to help a lot! It is indeed the same thread as the feed plug.

I suppose you already made a feed plug since 2013. But I have a suggestion for those making a feel plug in the future and that is to make it longer so you can actually grab it. The stock one is almost to small to get a grip on.

I also tried what I think is a Trracer co2 plug in the nightmare and it was not the right thread.

It did however fit well enough to be a feed plug. It grabs enough thread and there is so little depth of thread that it hangs there without cross treading. about 1 turn to remove and does not damage the body of the gun.
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Old 04-19-2019, 05:08 PM   #3 (permalink)
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Didn’t see that reply Turbo, but yes I did have one made that had about 1/4-3/8” knurling. It’s perfect for grabbing onto than the super thin stock plug.
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Old 04-20-2019, 05:46 AM   #4 (permalink)
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Nice. Someday I will get one made myself.
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