These can be covered with small metal flaps to prevent damage. One of the day periscopes ... and gunner's quadrant M1A1 . The M109 Paladin self-propelled Howitzer, first produced in 1963 and ...

As a result, the name M109 could refer to both an older M109A2 howitzer retrieved from storage and the modern M109A6 Paladin system, which, together with its updated version, the M109A7 ...