It has been replaced in service by the more modern 60 mm M224 mortar, which has a much longer range and improved ammunition.
The original M19 just had a simple spade-like M1 baseplate, leaving the elevation and traverse free for the firer.
A new mount, the M5, was developed, which used a conventional baseplate and bipod with elevation and traverse adjustment.
The 60 mm mortar is used by the infantry to lob high-explosive and white phosphorus smoke shells at well-protected hostile locations.
The weapon can also fire illumination rounds to light up the battlefield at night.