If the bayonet is side attached it is the mighty M44 carbine.
I also think it is Romanian made. From wiki:
Romania
* Triangular shaped markings, some with an arrow inside, on many components of the rifle. Normally three “R”’s surrounded by crossed stalks with leaves pointing outwards are on the top of the breech. Year stamps are quite visible.
* M44 Pattern Domestically produced version of post war pattern Soviet M44 Carbine during the years 1953 to 1955. Variances to the Soviet pattern produced minor differences.
Mine has the triangles, with the arrow inside, but no “r”s or crossed stalks.
parsy