Smaller version of MB with more powerful engine, armed with
single machinegun. Wings were folding, same way as on the predecessor. Fighter performed well, despite it was not equipped with
synchronizer. On some MB-bis it was installed to fire above propeller arc (see picture), on other - propeller blades were
protected by 'bullet-reflectors'.
Success of MB-bis helped F.E.Mosca to obtain 50k rubles subsidy. Aircraft was in production for more than two years (50 built
until 1918 and some - later).