AG/1 for machine gun!

Or I think it's 1:1 scale at least

The M109 Paladin is an American 155 mm turreted self-propelled howitzer, first introduced in the early 1960s to replace the M44 and M52. It has been upgraded a number of times, most recently to the M109A7. The M109 family is the most common Western indirect-fire support weapon of maneuver brigades of armored and mechanized infantry divisions. It has a crew of four: the section chief/commander, the driver, the gunner, and the ammunition handler/loader.
The British Army replaced its M109s with the AS-90. Several European armed forces have or are currently replacing older M109s with the German PzH 2000. Upgrades to the M109 were introduced by the U.S. (see variants) and by Switzerland (KAWEST). With the cancellation of the U.S. Crusader, non-line-of-sight cannon and M1299, the M109A6 ("Paladin") will likely remain the principal self-propelled howitzer for the UK

Silly German cannon:

The West German army M109s were designated as the M109G, and featured a breechblock system developed by Rheinmetall extending the effective range to 18 kilometres (11 mi) or 18.5 kilometres (11.5 mi) according to some sources, a new fire control system, and three smoke dischargers mounted on either side of the turret as well.[10][11]

In December 1966, the United States and Norway signed an agreement related to the co-production of the M109G.