Karabin przeciwpancerny wzór 35 (abbreviated "kb ppanc wz. 35"; "anti-tank rifle, model 35"), also Uruguay, was a Polish 7.9 mm anti-tank rifle used by the Polish Army during the Invasion of Poland of 1939. It was also known by its codename Uruguay (kb Urugwaj) (kb Ur), or by the name of its designer, Józef Maroszek.