As it was later discovered, the M-4 was unable to meet its original range goals and was limited to about . Unlike the US, the Soviets still lacked overseas bases in the Western Hemisphere and so the M-4 could not attack the US and then land at a friendly airbase. Production ended in favor of an improved version, the 3M, but it too was unable to carry out attacks on much of the US, including Washington, DC. Interest in the M-4 waned, and only 93 were produced before the assembly lines were shut down in 1963. The vast majority were used as tankers or maritime reconnaissance aircraft; only the original ten shown at the air show and nine newer 3MD13 models served on nuclear alert.Myasishchev 'Bison'
