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The design of an MIL 40 boat follows the model of Italian FB Design motorboats, acquired by Iran in 2002. Powered by two Isotta Fraschini diesel engines capable of producing 1,320 horsepower (0.98 MW), the boats move through a piercing propeller and reach a maximum of 62 knots (115 km/h). These are monohull boats made of Kevlar. The class design is 12.9 m (42 ft) long with a beam of 2.64 m (8 ft 8 in) and a draft of 0.82 m (2 ft 8 in). Their estimated standard displacement is 6 t (5.9 long tons).
Armament
MIL 40 boats are equipped with either a central machine gun mounted on the forward or two machine guns mounted on each side of the boat. A multiple rocket launcher is also installed on the roof.