I have full upgraded Black Hammer but I still have green progress line in icon bottom. Same bug have my friend at Black Hammer.
Please fix this bug
-
It has been like this since the perk "Hive Disruptor" was removed because it caused conflict with the perk "White Nail", when Bungie, one day, in the future, maybe before i have grandchildren, fixes the conflict, they will add Hive Disruptor again and after you enable it the weapon will show a yellow frame like all other maxed weapons.