.54 Green Mountain barrel breech plug?

[Prairieofthedog]

I have a Green Mountain .54 percussion 1"barrel that is a drop in for a Renegade.It is missing the breech plug,anyone know what size breech plug thread size I need?The breech is threaded from the GM factory.Thanks.

 

[necchi]

I'm pretty sure it's the common 3/4x16,, http://www.trackofthewolf.com/Categories/PartDetail.aspx/667/1/PLUG-TCF-16-3

I'd call Track before I'd order just to be sure.
But this plug will come "as cast" which will be larger than the barrel outside size and of course it'll need to be fitted, you can't just screw'm in and go,, :idunno:

Might be worth calling GM and see if they'll fit one for ya, might cost $60-70 by the time it's installed/blued and shipped back.

 

[Archie]

Just to throw a wrench at the entire question, I have a 1" GM .50 drop in barrel purchased in the early 1990's and the original .54 barrel from 1984 for the renegade. Both have 11/16"-20 threads breech plugs. That is not to say that yours is one way or another, just says there are some variations. So, it might be a good idea to get a measurement. Just for the fun of it, the t/c omega inline breech plug fits in both of these barrels!!

 

[Richard Brinkman]

My experience with GM barrels is if they were made as a replacement barrel for the T-C then they will have the 11/16 X20 threads. If the GM barrels are their standard barrel then it will have the 3/4 X 16 thread. But it would be a good idea to check to see exactly what you have.

RB