This metal Rogue Trader-era Chaos Renegade was initially shown as an Emperor’s Children Renegade (021613).
He’s seen in the 1991 Blue catalogue as “Bolter 6”, part number 070315/17.
White Dwarf #104 has him:
The sculpts on the page in the 1991 catalogue are credited to both Michael Perry and Kev Adams, and I’m not sure which one did this particular miniature.