sentences:  The 122 mm Gun D-74 was a competitor to the M-46; and while many were produced, the M-46 became the only long range Gun in Soviet service until new 152 mm Guns in the 1970s.The M-46 was developed from the M-36 130 mm naval gun used on ships and for coast defence.It is a true gun, being unable to fire much above 45° and having a long barrel and a single propelling charge.