In 1994, RDM Technology as a private venture, completed a study to upgrade the older former Soviet 130 mm M-46 field gun which has a maximum range, firing standard unassisted ammunition, of 27,000 m.

The upgrade would include replacing the existing 130 mm ordnance with a new 155 mm 45 calibre ordnance which would enable a range of 39,000 m to be achieved firing an Extended Range Full-Bore Base Bleed (ERFB-BB) projectile.

This upgrade is also applicable to the China North Industries Corporation (NORINCO) equivalent of the M-46, the Type 59-1.

Study.