The Ckm wz. 30 was a Polish-made clone of what American heavy machine gun used by the United States in World War I, World War II, Korea and to a limited extent in Vietnam?
Ckm wz. 30 Ckm wz. 30 (short for "ciężki karabin maszynowy wz. 30"; "heavy machine gun 1930 Pattern") is a Polish-made clone of the American Browning M1917 heavy machine gun. Produced with various modifications such as greater caliber, longer barrel and adjustable sighting device, it was an improved although unlicensed copy of its predecessor, and was the standard machine gun of the Polish Army since 1931.
Mannlicher M1895 The Mannlicher M1895 (German: "Infanterie Repetier-Gewehr M.95" , Hungarian: "Gyalogsági Ismétlő Puska M95" ; "Infantry Repeating-Rifle M95") is a bolt-action rifle, designed by Ferdinand Ritter von Mannlicher that used a refined version of his revolutionary straight-pull action bolt, much like the Mannlicher M1890 carbine. It was nicknamed the "Ruck-Zu(rü)ck" (German slang for "back and forth") by Austrian troops and "Ta-Pum" by Italian troops who even wrote a song about it during World War I.