 The SP70 was 'outgunned' on several occasions by the M109 and further development was cancelled in the 1980s.The role envisioned for the SP70, which was to replace the widely used U.S. M109 self-propelled howitzer, was ultimately fulfilled in UK service by the AS-90, or self-propelled gun for the nineties, another self-propelled 155 mm howitzer system, which was originally created by an independent team which had anticipated that the SP70 project would fail.The interior layout has space for three crewmen on the right (the layer, the crew chief, and the magazine operator) and the charge loader on the left.