The UES needed mobile heavy firepower. Their orbital guns could cut through an enemy crusier, but they had nothing mobile with the same capability. So they mounted an orbital gun on a crusier and armed the crusier with a number of extra laser cannons and missile pods. Thus the Devastator class Destroyer was born.
Name: UES Pounder
Weapons: 1x "Planet Smasher" Thunder G.U.N Cannon, 16x mideium laser cannons, 2x long range high capacity guided missile pods.
Engines: Two type four deep space Svakratan ion reactors, 2 Type 1 Kavrathium Reality Distorting Lightspeed Drives (RDLDs)
Top speed: 14x Light speed.
Crew: 3: Captain, Helm officer and Weaponry Officer.
Open boarding ramp
The "Planet Smasher" and main offensive battery
This was a fun build inspired by the UNSC Frigates from Halo. I don't acctually think the end result looks that mush like them, but make up your own mind.