Cz 527 American with 24” proof carbon barrel stuffed in it.

[Stinky Coyote]

Don’t think it’s quite that simple here in the states. CZ barrels are metric threads, most regular gunsmiths here are setup to cut “standard” threads. Switching back and forth between metric and standard drives the cost of the labor through the roof and makes it impractical. At least around here. He did say, he thought PAC-Nor would/could cut metric threads on the tenon before shipping. Don’t know!

maybe I'm spoiled with a smith who is a machinist by trade? but yes I do believe they are metric threads, my smith didn't even bat an eye at it when I brought it up