World in War: Vietnam is an ambitious mod project that brings the Vietnam War to Men of War. You will follow the stories of 6 American infantrymen, from State-side bootcamp to the horrors of jungle warfare during the Tet Offensive.
A versatile 81 mm mortar. Good for firing HE and Illum shells. Nothing too special, but gives infantry a huge punch. Note that it's the heaviest mortar in US arsenal with a reasonable mobility - its larger cousin, the M30 107 mm weighs over 305 kgs.
Seen here in its native environment. :)