Complex sentence: Each model of the Merkava has two 7.62 machine guns for anti-infantry defense and a 60 mm mortar that can be loaded and fired internally.
Split into simpler sentences: Each model of the Merkava has two 7.62 machine guns for anti-infantry defense. Another unique feature, present in every model of the Merkava, is the 60 mm mortar that can be loaded and fired internally.