Let You Renovate It, What the Hell Is This Magic Modified Electromagnetic Gun?

Weapons engineering genius Su Xing traveled through a parallel world. On the eve of his graduation from the military academy, he was framed by a traitor and lost his military rank and honor! I got the chance to stand out at a technology exhibition by chance! It just so happened that Major Fa Xiao sponsored three war-damaged versions of Gatling! Want me to change the barrel? Spray paint? Make a new one? Low! Too low! If you want to stand up, you have to come up with something ruthless! Summon the interstellar mechanic system, three battle-damaged Gatling guns, and a magically modified electromagnetic gun! Pull it out and test it! A cannon blasted through Mount Fuji in my childhood! One cannon blasted Xiaobangzi's 38th line to pieces! Destroy the Pentagon with one cannon! Commander of the Far North Theater: "Restore all the honors of Su Xing, grant the military rank of general, and the military title of deputy commander of the theater!" Dean of the 511 Research Institute: "Our institute invested 300 million to acquire Su Xing's civilian factories and hired Su Xing as the commander-in-chief of the Research Institute!" Su Xing: "I'm just an A, why are you all so old?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.