GX-7 quad laser cannon
From Wookieepedia, the Star Wars wiki.
GX-7 quad laser cannons were medium laser cannons used by Sienar Fleet Systems Immobilizer 418 cruisers.
[edit] Behind the scenes
The name for these cannons may have resulted from the name of the G-7X gravjectors that were also used by the Immobilizer cruisers.
