gasoline engine and VVSS suspension. 50 units converted. M-50 Cummins – subvariant with Cummins diesel engine and HVSS suspension. Sherman M-51 – Upgraded M4A1 (HVSS) with improved engine and T23 turret modified to fit a shortened variant of the French 105 mm Modèle F1 gun with large muzzle brake. Was used in the Six Days War and the Yom Kippur War. Sometimes colloquially referred to as Isherman. About 100 of the remaining tanks of this model were sold to Chile in late 1970s, where they received a new engine and transmission in early 1990s. All of them were replaced by ex-Dutch Leopard 1V in late 1990s Artillery tanks See Rocket artillery for rocket/missile tank photos. M-50 155 mm – The M-50 was an open structured self-propelled artillery piece, mounting a single French Model 50 155 mm howitzer at the back of the hull, which was based on the "long" hull of M4A4 fitted with Continental engine (late production vehicles possibly used "short" hulls from other variants). The gun was developed in the early 1960s by Israeli Ordnance Corps in cooperation with France. Probably about 120 units were produced. In early 1970s M-50s were fitted with HVSS and Cummins diesel engines. It was used in the War of Attrition, Six Day War, Yom Kippur War and the 1982 Lebanon War. Some reserve units were armed with the M-50 at least until 1985. Ro'em (colloquially known as L-33) – A self-propelled artillery piece mounting Soltam M-68 155 mm L/33 howitzer in large enclosed superstructure. Uses Sherman chassis with Cummins VT-8-460Bi diesel engine and HVSS. Probably about 200 units were produced. The gun saw combat in the Yom-Kippur War and the 1982 Lebanon War. Currently out of active service. L-39 – Like L-33, but with longer (39 calibers) barrel. Apparently it was not adopted. Makmat 160 mm – Soltam M-66 160 mm mortar mounted on a Sherman chassis, in an open-topped compartment with folding front plate. It was adopted in 1968 and used in the War of Attrition, the Yom Kippur War and the 1982 Lebanon War. MAR-240 – In place of the turret, a side-looking launcher for 36 240 mm rockets was fitted. These were Israeli made copies of the Soviet rockets used by the BM-24 multiple launch rocket system. Apparently never reached mass production. MAR stands for Medium Artillery Rocket. Episkopi – Similar to MAR-240, but mounting a back-looking launcher for