The Maxim M/32-33 is a Finnish modification of the Russian M1910 Maxim, developed by Aimo Lahti in 1932. Lahti was ordered to adapt the Maxim so that it could be fed with more modern metallic ammunition belts as opposed to the original cloth belts. The resulting weapon was able to fire at a rate of 850 rounds/min, whereas the Russian M1910 and earlier Finnish M09-21 were only capable of 600 rounds/min. The increased rate of fire was achieved through improvements that included an accelerator mechanism and muzzle booster. Other changes included a redesign of the Maxim M/32-33's grips and rear sights, as well as an installation point for an optical sight.