I want to scratchbuild an accurate 2A46M-5 tank gun for a T-90A, but I need three measures: Diametre of the gun barrel (the part shrouded in the thermal sleeve, I don't care so much about the muzzle, it can be estimated)) and the diametre and length of the bore evacuator... I think these measures can be taken of the Tamiya T-72 gun or the Eduard replacement barrel. The 2A46M-5 gun is a little longer (125 mm/L55), but I don't think it is thicker or thinner. Thanks a lot in advance. Most regards.

Jose