GEAR & TECH

The American howitzer you never heard much about

Some artillery pieces become very famous. Some of the most notable are the French 75 of World War I, or the Napoleons used during the Civil War, or the German 88. But some are less well-known, but packed a big punch – or long range – of their own.


One such artillery piece is the M107 self-propelled howitzer. This 175mm artillery piece entered service in 1962, alongside the M110, an eight-inch self-propelled howitzer. It could fire shells as far as 25 miles away – and this long range proved very handy during the Vietnam War.

SGT Max Cones (gunner) fires a M107, 175mm self-propelled gun, Btry C, 1st Bn, 83rd Arty, 54th Arty Group, Vietnam, 1968. (US Army photo)

The M107 is not like the M109 self-propelled howitzer in that it is open, and lacks both a turret and on-board ammunition storage. As such, it needed its ammo vehicles nearby to provide shells. The M107 was fast for an armored vehicle, with a top speed of 50 miles per hour, and could go almost 450 miles on a single tank of fuel.

The M107s used the same chassis as the M110s. In fact, Olive-Drab.com reported that the two self-propelled howitzers could exchange guns, thus a M107 could become a M110, and vice versa. This was used to good effect in Vietnam, where the barrels could be swapped as needed at firebases. Israel also used the M017 for decisive effect in the 1973 Yom Kippur War, destroying a number of Syrian and Egyptian surface-to-air missile batteries, and even shelling Damascus.

A gun crew member from 1st Battalion, 83rd Arty, takes a short break on top of the loading mechanism of his self-propelled 175 while waiting for further instructions. (US Army photo)

According to GlobalSecurity.org, the M107 fired only one type of conventional round, the M347 high-explosive round. The gun didn't see service long past the Vietnam War. The M107 had a long reach, but it was not accurate – rounds like the laser-guided Copperhead or the GPS-guided Excalibur had not been developed yet.

An extended barrel for the M110 was developed, and in the late 1970s many M107s were converted to the M110A2 standard. The M110s eventually were replaced by the M207 MLRS.