The mouth of a Merkava MK.I

The Merkava is a main battle tank used by the Israel Defense Forces. The tank began development in 1973 and entered official service in 1979. Four main versions of the tank have been deployed. It was first used extensively in the 1982 Lebanon War. The name "Merkava" was derived from the IDF's initial development program name.

It is designed for rapid repair of battle damage, survivability, cost-effectiveness and off-road performance. Following the model of contemporary self-propelled howitzers, the turret assembly is located closer to the rear than in most main battle tanks. With the engine in front, this layout gives additional protection against a frontal attack, especially for the personnel in the main hull, like the driver. It also creates more space in the rear of the tank that allows increased storage capacity, as well as a rear entrance to the main crew compartment allowing easy access under enemy fire. This allows the tank to be used as a platform for medical disembarkation, a forward command and control station, and an armoured personnel carrier. The rear entrance's clamshell-style doors provide overhead protection when off- and on-loading cargo and personnel.

with its gun M68 (L7 A3) gun105 mm

The mouth of a Merkava MK.I

Photo is taken in German's Panzermuseum Munster!