J-1 tank gun

"Woah! That's one BIG gun!"

- A Clone trooper upon seeing a Black Mamba super-heavy tank

The J-1 tank gun was a tank gun which served as the main armament of the Black Mamba super-heavy tank, Earth's superweapon tank.

The J-1 was basically the gun from the J-1 semi-autonomous proton cannon which had modified for tank use, the size of the gun, and of the shells used by it, meant that the Black Mamba was a huge and extremely heavy tank, and had 2 loaders, since 2 loaders were needed to load the large, heavy shells onto a platform for the gun's rammer to push it into the barrel.

The gun was the largest tank gun ever put on a tank from Earth, and was both extremely accurate and exceptionally powerful, able to destroy any Republic ground vehicle in a single hit, the J-1 proton cannon's gun being noted for being able to destroy Acclamator-class assault ships in seconds.