Subsequent Development
Bull continued work on the GC-45, producing a much more practical version known as the FGH-155. In addition to a number of detail changes and deeper rifling, the FGH-155 allowed standard M-107 ammunition to be fired using a plastic adaptor ring. Bull also felt that the FGH-155's carriage was suitable for a larger gun, and worked on the FGH-203, an 8" (200 mm) gun adapted from U.S. standards in a fashion similar to the original GC-45 work. The increase in projectile weight gave the new weapon a range of over 50,000 meters with normal ERFB-BB ammunition, making it one of the longest-range artillery pieces in the world. The gun was also purchased by the Iraqis, who mounted it in a self-propelled form to create the Al-Fao.
The Chinese armed forces also used the Norinco version, producing it as the Type 89 starting in 1986. They also mounted it on a locally-designed tracked chassis to produce the PLZ-45 (also known as the Type 88), along with an ammo-carrier based on the same chassis. The PLZ-45 did not enter service with the Chinese PLA due to costs, primarily because their existing artillery at the time was all based on Soviet-standard 152 mm ammunition. However two major batches of PLZ-45s were sold to the Kuwaiti Army in 1997 and 2001.
The Denel G5 version has also seen continued development. The gun has been placed on an OMC 6x6 chassis as the G6 howitzer, and won major export sales to the United Arab Emirates and Oman. In response to an Indian requirement, the G5 was mounted on a 4x4 truck, resulting in the T5, though as of 2012 none had been ordered. It is also fitted into a turret that can fit on any suitable vehicle. The turret is marketed as the T6 which has already been fitted on the T-72. Denel also used the basic ERFB ammunition concept to develop a 105 mm gun, the G7 howitzer, which allows artillery to be downsized to improve mobility.
Read more about this topic: GC-45 Howitzer
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