the P-380 Corona was developed at the height of the Earth Colonial War, by the Aerospatial Engineering Corps of the Colonial Liberation Army. harkening back to the ancient wars of old Earth, they stumbled across the design for the P-38 Lightning. they were fascinated by such a revolutionary Airframe, and swiftly set to work constructing a similar spaceframe.
arguably the most feared of the P-380's variants, the A-model Corona mounted secondary bussard collectors, and traded three of the Cold-Coiled Particle Guns for a fearsome 88mm Sniper Cannon. originally sniper cannons were long-range defensive guns, designed to cripple enemy strike fleets outside of their operational range. effectively firing high-velocity missiles, fixed sniper cannons were terribly ineffective. when a C.L.A. engineer thought to mount one on a fast-attack spaceframe, however, an entirely different beast was born.
the P-380-A fires smaller, more advanced shells than fixed emplacements had in their brief service lives. solid-rocket engines gave way to fusion bottles, and conventional explosive and nuclear wareheads were frequently left behind in favor of devastating 'plasma hammer'* armor-piercing weapons. a notable example of their terrfying effectiveness is that of Lt. 'Jackhammer' Ryan, of the C.L.A. 6th regiment, the only sniper in the entire war to have a shot/kill ratio greater than one! his preference for the plasma hammer weapons is what earned him his callsign, after he successfully diasbled 3 enemy cruisers with a single shot.
he insisted that the shot was pure luck, but by now it has become legend. he sighted up the first cruiser 5000km out and fired a shot, intending to breach one of her primary bulkheads. because of the self-propelled nature of the rounds, they accelerate continuously in a vacuum. when the round struck, it was travelling so fast that the hammer charge carried it all the way through the longest axis of the cruiser, neatly spearing her reactor core in the process, and exiting through one of her thrust nozzles. it's residual velocity carried it into the second cruiser, where it impacted the bridge sector and spaced the entire command crew, as well as crippling the control systems. out of control, the second cruiser plowed into the third, destroying both of them. nobody would've thought much of it, except to call it a very lucky shot, but Jackhammer seemed to always come back from sorties with tales like this, and projectile footage to back it up.
*Plasma Hammer warheads actually employ two fusion bottles. the first providing thrust to the projectile, and the second, activated 20m from the target, venting plasma over the forward surface of the shell. this produces an incredible piercing weapon, since the plasma will simply feed it's reaction potential on most materials. the shell body itself is usually composed of Tungsten Ferro-Carbide, to improve it's resistance to active fusion. despite this, most recovered plasma hammer projectiles are little more than slivers of metal, in comparison to their original size.
notice the plasma-vent pipes. the first feeds into the remaining CCPG, where it's energy is used to increase the hitting power of the shot. should that system be overloaded, excess plasma is vented to space through the second pipe.