An M50 Quadmount fitted to the truckbed of a Cedco M37 2.5-ton truck. While the M37 was the official prime mover of the M50 on M17 trailer, the weapon was frequently mounted to the truckbed for improved mobility. Both the M37 and the heavier 5-ton M26 truck were employed in this manner, although the M37 more so than the M26. While the weapon system was rendered obsolete as an AA system with the advent of jet aircraft, the mount remained in use for infantry support and convoy defense. Often, their presence alone was enough to deter attacks. It would remain in this role until 1974, when they were officially retired, replaced by the M134 and GAU-19/A Gatling-style machine guns on Humvees.