The M109 is a modern American self-propelled gun. The first prototypes of the car were built in the 1950s, and serial production started in 1962 continues to this day. It is estimated that currently in all armies of the world there are about 4,000 copies of this weapon. The M109 is powered by an engine Detroit-Diesel Model 8V-71T with 405 HP. The platform version (M109) is armed with a single 155 mm M126 howitzer and one 12.7 mm M2 machine gun.

The M109 was created to replace the M44 self-propelled gun in the line