HMC made barrels are probably the best in the market and the French Blanks mated with Ukrainian engineering (correct me of i am wrong) provide it with amazing reliability.Strangely, despite similarities with the Russian 2A46Mxx, Chinese ZPT-98 maingun is a bit of a mix bag. While it offers better firepower and barrel life, chrome platting, is auto fretagged, extra chamber pressure, the barrel is not front removable due to fixed cradle assembly.
VT-4/ MBT 3000 with front removable barrel (probably HMC made).
Note: HMC made 125mm barrels are front removable, and feature double chrome platting as well. They seem to have borrowed the best features of both zpt-98 and KBA-3. (KBA-3 lacks chrome platting).
Its well suited for Pakistan's environment and much better than the Chinese and Ukrainian offerings