M109A2s and M109A3s improved with Nuclear, Biological, and Chemical / Reliability, Availability, and Maintainability (NBC/RAM) improvements, including air purifiers, heaters, and Mission Oriented Protective Posture (MOPP) gear.
::* 1st Marine Artillery Regiment (Phoenix) : equipped K55 SPH / KH179 TH
Howitzer | howitzer | M777 howitzer | M109 howitzer | M102 howitzer | BL 18 inch railway howitzer | M110 howitzer | Big Bertha (howitzer) |