The SW-7 ion cannon, an ion cannon produced by ArMek, was a standard armament on the MC80 Star Cruiser. In the Battle of Endor, each MC80 Star Cruiser was outfitted with two dozen of these cannons.
The Star Wars Technical Journal of the Rebel Forces, a Star Wars Legends periodical from Starlog Communications International that came out on October 1, 1994, was the first place the SW-7 ion cannon was referenced. The SW-7's initial mention in the modern Star Wars canon occurred in De Agostini's reference work, Explosives, Heavy Weapons, and Power Sources, which was published in Spain by De Agostini on February 2, 2021, and in France by Altaya on February 5, 2021. Its publication in Mexico occurred on March 22, 2021.