The design was inspired by (and named after[5]) the Swedish Carl Gustaf m/45 and its Egyptian Port Said variant, however the similarity is often only passing.

[1] The Carlo's homemade nature makes it affordable on the black market, where it is purchased not only by Palestinians targeting Israelis[6] but also by Arab-Israeli gangs.

[9] On February 3, 2016, the Carlo was cited as the weapon used to shoot Israeli Border Police officer Hadar Cohen, which has some parts made from old pipes.

[4] Israeli law enforcement agencies, including Shin Bet, conducted raids on March 16, 2016, to crack down on underground gunsmith shops making the Carlo.

[1] On July 14, 2017, three Arab-Israeli terrorists armed with Carlo submachine guns, opened fire on Temple Mount murdering two Israeli Druze policemen, Haiel Sitawe and Kamil Shnaan.