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G'Day Fella's,

Haverluk, according to my records, they are the following;

Brno ZKK 600-601 = 1.020" x 2.00mm Pitch

Brno ZKK 602 = 1.100" x 2.00mm Pitch

So if you divide the Imperial thread diameter (1020" and 1100") x 25.4, you will end up with the Metric diameter.

Hope that helps

D'oh!
Homer

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Looking to change out some barrels on some BRNO ZKK actions.

Curious of the barrel thread sizes.

The 602 and 550 magnum are M28x2
The 550 standard length is M26x2

What are the thread patterns of the ZKK 601 and 600 (short and standard length actions)?

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So from Homer's notes the ZKK 600/601 barrels would then verify your notes against the CZ 550 standard action - had a win Haverluk

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