 At 1949, the club was renamed again, so they started to play under the name "Radnički Ivangrad".Biggest success in Montenegrin Republic League came in 1951 – Radnički Ivangrad won the title after the hard struggle with FK Sutjeska, but failed to promote to the Second League.Most significant success in the decade came in 1955, when the team gained promotion to the Yugoslav Second League, where they spent only a single season.