dude are u serious ?
from your links :
The M109A2, M109A3 and M109A4 howitzers used the M185 cannon with a range of 23,500 meters.
The range was increased to 30,000 meters with the M109A5 and M109A6 by replacement of the M185 23 caliber long barrel with the M284 cannon 39-caliber barrel. (
M-109 155mm Self-propelled Howitzer
The M109A2/A3/A4 howitzers uses M185 cannon and achieves a range of 23,500 meters.
The replacement of the 23 caliber long barrel with the M284 cannon 39-caliber barrel on the M109A5/A6 increased the range capability to 30,00 meters.
Maximum Range (M109A2/M109A3/M109A4)..........................18,000m
....................................................................................................RAP 23,500m
Maximum Range (M109A5).........................................................22,000m
....................................................................................................RAP 30,000m
M109 155mm SP Howitzer
a new M284 cannon and a new M182 gun mount. These improvements provide the M109A5 with greater range and allow for sustained fire for prolonged periods of time.The M109A5, 155mm SP medium howitzer is a vehicle that provides armored combat support, is air transportable, internally loaded, and has excellent ground mobility. The
M109A5's main armament is the 39-caliber, M284 cannon, which has a maximum range of 23,500 meters with unassisted projectiles and 30,000 meters with Rocket Assisted Projectiles (RAP Rounds). M109A5 155mm SP Howitzer
The replacement of the 23 caliber long barrel with the M284 cannon 39-caliber barrel on
the M109A5/A6 increased the range capability to 30,000 meters.
M109 - Danish Army Vehicles Homepage
30.000 M = 30 KM your A5 range !!! Now get an umbvrella as K9 gonna rain few shells while parked at 50 km !!!
How bad