TM FN 57 Tanio-Koba Barrel?

[Dinsy]

Hey guys,

pimping out my TM 57, getting new recoil spring, nineball outer barrel and recoil spring ring, and also found a new tm rubber.

Main question is does any one know which pistols shares a same/simular internal barrel length? as I can't find the lengths of Tanio-Koba barrels anywhere.

Cheerz,

Dinsy

ALSO, anyone had experiance with firefly cylinder valves? quite alot of monies, but if they're worth it might throw one of those in too