Identify this part, win stupid prizes.

[ar15barrels]

One guess only.



What make and model is it from?

[California44]

Shotgun Choke

[ott1]

Stoner 63?

[ar15barrels]

Shotgun Choke

Stoner 63?

no to both.

[Dr Rockso]

Looks like a Knight's URX barrel nut, but a weird one... SR-25?

[penguinofsleep]

surprise candy?

[Plisk]

Knights URX Barrel Nut

[NorCalDustin]

Yeah its a URX nut

[ptoguy2002]

Colt 6940 setup. I'd imagine they use something similar on the 6940P too.
What do I win?

[Sugacookie]

Knights URX Barrel Nut

[ptoguy2002]

URX barrel nut has rounded wrench flats.
Colt 6940 has square.
Tapered collar on extension, index slot on bottom....
Nut is Colt 6940.

[ptoguy2002]

OH, on that thought, does that mean you have the tools to do 6940 barrels, and can put a 6940 extension on a 3rd party barrel?

[ar15barrels]

Colt 6940 setup. I'd imagine they use something similar on the 6940P too.
What do I win?

Winner.
I have half a milk crate of seasoned ash firewood for you.
Come and get it.

[ar15barrels]

OH, on that thought, does that mean you have the tools to do 6940 barrels, and can put a 6940 extension on a 3rd party barrel?

I dont have the tools for 6940, but now that you mention it, maybe I should make the special nut tool before I send this barrel back to its owner!
It should be no problem to take apart a 6940 barrel and fit a new barrel into the 6940 extension and folding FSB.
I measured and made drawing the 6940 extension for my files.
The length is the same as a standard AR extension.
A standard barrel extension wrench will remove and install 6940 extensions.

[ptoguy2002]

Winner.
I have half a milk crate of seasoned ash firewood for you.
Come and get it.

With my luck, SCAQMD would come fine me if I used it.