machine gun, MG = karabin maszynowy

Thompson Machine Gun

Source: http://k9zw.wordpress.com/2008/01/31/class-iii-for-you-and-me/

karabin maszynowy

machine gun , MG (abbreviation) = karabin maszynowy

English sentence and Polish translation

The only machine gun I have is a very fine dummy. = Jedyny karabin maszynowy, jaki mam, to bardzo dobra atrapa.