Mortar cannon
Mortar cannons are reasonably common weapons used by Autobots, Decepticons, and even humans.
Fiction
Marvel The Transformers comics
In robot mode, Bombshell carries a head-mounted mortar that fires 50-pound explosive shells with a range of eight miles. Bombshell's Universe profile When he's not carving up enemies with his diamond-hard, micro-serrated beak, Buzzsaw can fire five rounds a minute from his twin mortar cannons. Buzzsaw's Universe profile As befits a "walking armory", Fortress Maximus has twin laser-guided mortars built into each of his lower legs. Fortress Maximus's Universe profile In vehicle mode, Outback carries a turret-mounted mortar cannon which can fire armor-piercing shells up to a distance of three miles. Outback's Universe profile Punch uses a twin mortar launcher capable of firing highly-combustible firebombs a distance of 3000 yards. Punch/Counterpunch's Universe profile Slammer's cannon shoots explosive rocket-propelled mortar shells that have a 1.5-mile range. Metroplex's Universe profile Finally, in jet mode, the Aerialbots' resident sharpshooter Slingshot can hit a highway stop sign six miles away with his twin mortar cannons. Slingshot's Universe profile
As well as wire-guided surface-to-air-harpoons and single-man hovercopters, G.B. Blackrock's oil-drilling platform was armed with mortar cannons. When Shockwave attacked, Josie Beller fired the mortars but they were completely ineffectual against the Decepticon. The Worse of Two Evils!
When the Autobots were lured into a Decepticon ambush in the Arctic by the treacherous Starscream, Buzzsaw took revenge on Omega Supreme by blasting him with his mortar cannons. He fired them at Swoop as well, but apparently missed. Dark Star
Finding himself being stalked across a ski resort by Carnivac and Snarler, Spike Witwicky called down the body of Fortress Maximus from the Ark and by combining with it, he was able to use Max's leg mortars to drive away the Pretender Beasts. The Man in the Machine!
The Transformers Adventure Game Books
Peril from the Stars
During a confrontation at the Los Palmos observatory, you suggested to Jazz that you should attempt to get away from Bombshell, but the aerial Decepticon quickly overtook you, transformed to robot mode, and killed you and Jazz with mortar fire. Peril from the Stars
Find Your Fate Junior
Dinobots Strike Back
Bombshell and Kickback infiltrated Hidden Valley, where the Dinobots were supposed to be on lookout duty but were arguing amongst themselves instead. Taking advantage of this distraction, Bombshell transformed to robot mode and launched a mortar which knocked them all out except Swoop, who managed to get away but had one of his wings damaged in the explosion. Dinobots Strike Back
