This Rogue Trader era Warhammer 40K miniature is from the RT7 Mercenaries range. He went by Inquisitor Augustus Hargen and is a Bob Naismith sculpt.
Sadly there’s no info on the tab so I can’t give a sculpting year. His bolter is not normally detached – someone has repositioned it prior to it coming into my possession.
This mini is a resculpt of Sir Gigal de Appliance:
Combined with the JD14 Traitor General, which is a mini I do not yet have.