MG1-A proton torpedo
From Wookieepedia, the Star Wars wiki.
The MG1-A was a type of proton torpedo which was, at the time of the Battle of Praesitlyn, newly developed and yet to be tested in battle. The Centax-class heavy frigate Ranger was armed with two MG1-A torpedo batteries and was the first ever vessel to employ them in combat. In the opening shot of the battle above Praesitlyn, Ranger fired a salvo of the warheads at a Separatist Droid Control ship, who was jamming signal in the area, successfully eliminating the target.
MG1-As had an effective range of three thousand kilometers and a flight velocity of twenty thousand kilometers per hour. They were unaffected by energy fields and their homing systems could be deactivated to allow for unguided use as line-of-sight weapons.
