Making best use of available equipment appears to be the thinking behind modifications turning Ethiopian Federal Defence Forces (FDF) armoured personnel carriers (APCs) into self-propelled artillery pieces. Ethiopia is believed to have about 20 WZ551s in service and at least 450 D-30 guns as well as two dozen M-46 130 mm towed guns. It has apparently mounted D-30 guns on T-55 tank chassis in previous efforts to create self-propelled artillery, although this cannot be confirmed. The FDF released the modified APC photograph during a visit by senior officers to the Ethiopian Defence University in Bishoftu, which it said is working on upgrading weapons. China also delivered ten Type-89 APCs in 2013; four PHL-03 300 mm self-propelled multiple rocket launchers (MRLs) in 2019, and ten BP-12A surface-to-surface missile systems in 2020.