Originally Posted by ClearAirTurbulence
I've got a CZ 455 with factory threaded barrel.

0.615" at the shoulder where my Sparrow snugs up. Works fine.

Edited to add that I just measured the outside diameter of the part of the Sparrow that actually contacts the shoulder on the barrel and that appears to be 0.600".


Thanks turbulence. Is yours a American sported profile? If so if factory threaded I bet it’s 16.5”. I’m leaning to just get em cut at 16.5” and be done with it. I’d like to go 17” but not sure I’d have enough shoulder for the sparrow to snug up against.
Thanks,
Big Ed

"Only accurate rifles are interesting"
Col. Townsend Whelen