Looking through my barrel box and found a new barrel, CM 24" in half octagon. It has a 5/8"x 1.00mm thread on a .940 length tenon. It is .540 at the muzzle. I think that it is a rimfire barrel. It is drilled, but not tapped for iron sights. 2" apart on the rear sights and 1.5" on the front sight. I want to peddle it, but don't know what I am selling.
Butch

What is the chamber like,is it a chamber for a 22lr. as you thought? I ran across these barrel specs. Thread extension length-.688,Major dia of extension-22mm,threads are 1.5mm 60degree "v" type.Min. O.D.-1.000" These specs are for a mark x Mini-mauser (interarms) Van

Van, the major diameter measures .624 and a thread guage measures 1.00 mm. It is a rimfire chamber.
Butch