Thanks Gnome!, trying also to find sizes of the brass end (2 piece) so I can turn a set up - does anyone know the dimensions please?

So no responses on here - had hoped for some advice?

Hi All, I'm currently running an S400 carbine in and HFT laminate stock which i like the balance of. I'm interested in free floating the barrel, but feel the s400 barrel is too thin. Is it possible to shorten a CZ 200 barrel and if turned down will it then fit the s400 breech block? Would it also be...