Barrel Thread ID

[Cdn_Cuda]

Gots my a super cool Armson barrel, but have no idea what thread it is. I definitely know what it is not, which is any marker I currently own. So in MCB fashion may have to buy a marker to use with my barrel.

[scottieb]

It looks like ICD threading.

[Ecapnation]

I've it's double leed

[Rolling Thunder 67]

I concur with scottieb, it's ICD, having just bought a LAPCO adapter yesterday for ICD to Cocker and it matches your top pic, unfortunately my crappy phone will not take a very detailed picture to show the threads. Also have the Thunder Cat to go with the adapter and a DYE stainless barrel plus stock barrel if your interested. And if you can't trust a fellow Canuck, who can you trust?,