Railgun Precision Munition System

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The Railgun Precision Munition System, RPMS, or simply Railgun Artillery is a space-based kinetic bombardment weapon mounted on space destroyers primarily used by the AcDragonians.  Railgun Artillery was developed as a cost-effective but still powerful weapon delivery system to bombard planetary targets.
The primary advantage of this weapon system is that the weapons themselves fall below the category of planetary assault weapons, which are weapons solely made to bombard planetary targets such as ultra-high caliber rounds, missiles, or other high powered weapons.  Since the RPMS simple accelerates a projectile to high speed and generates all of it's force through kinetic energy transfer, it's legal to use against planetary surfaces according to the Dragon Charter, making it the first highly cost effective and flexible tactical weapon in the system.
==Technical Details==
Railgun Artillery was adapted from anti-ship railguns as a solution for tactical orbital support that didn't require the use of either high-energy space weapons or weapons of mass destruction, while generally leaving the surrounding infrastructure outside of the impact area relatively unharmed.  The munition is a simple Tungsten-Steel round that is launched via a dedicated railgun toward a planetary surface.  The projectiles are accelerated to 16km/s (~58000km/h) toward the object's surface which then impact with enormous force.  The rounds vary in weight and size depending on the amount of damage that needs to be inflicted.  The weapon is very difficult to defend against with little to no warning of it's approach but also the mass of the round make it difficult to intercept.  Smaller, less devastating munitions are used in the launchers as well for tactical strikes in lieu of traditional artillery.
The Railgun Artillery makes a characteristic boom when it enters earshot because of the extreme speed at which it travels but normally by the time the boom is heard the munition already impacted the target.  The saying on the ground as a result of this is "If you hear the boom, it wasn't aimed at you".
==Ammunition Types==
=== Kinetic Penetrators ===
The Rail Gun Kinetic Penetrator - Tungsten-Steel or RGKP-TS round is the standard Rail Gun Artillery munition.  It deals its damage primarily through transfer of kinetic energy into the target due to it's blindingly fast impact speed. Using standard relative physics, these rounds can deliver devastating but highly accurate damage to targets ranging from individually targets to entire battalions of troops.
==== RGKP-TS4A2 ====
The round weighs in at 300kg and when fired out of the gun it reaches speeds of 16km/s impacting with a blast yield equivalent to 9.1 tons of TNT.
==== RGKP-TS5A1 ====
A modified development of the standard Kinetic Penetrator, the TS5A1 round is a much smaller but still equally dense munition. Weighing in at over 90% less than a standard KP munition, the TS5A1 is used in a precision strike role. Instead of sending a round into the dirt with enough force to rival conventional explosives, these rounds are instead directly fired at individual targets. A guaranteed kill shot for whatever it hits, these rounds can also be used to crack open bunkers, hardened structures or make entry into locations while greatly limiting collateral damage. These rounds are a favorite when used in dense jungles/forests or urban areas where explosives can give rise to unacceptable amounts of damage.
=== Explosives ===
The Rail Gun High Explosive rounds are munitions that deal damage through explosive force. These are generally considered the orbital equivalent to standard artillery guns but on a much improved scale.
==== RGHE-SM2 ====
The Rail Gun High Explosive - Standard Munition 2, or simply RGSM2 is a modified version of the Standard Munition 2 which is the commonly built and fielded high explosive round used by AcDragonia. This variant is scaled up and modified for rail gun use. Literally an orbital artillery round, the RGSM2 has an explosive yield of 1100lbs (500kg). It is commonly referred to as the "thousand pounder" by ground troops even though the explosive yield is slightly higher than 1000lbs.
==== RGHE-U3A6 ====
The Rail Gun High Explosive - Ultra round is an adapted round for use in the Rail Gun Artillery system.  Designed as a battalion killer, it's Ultra-High Explosive payload explodes with an equivalent of 2kt of TNT.
==== RGHE-U4A1 ====
The RGHE-U4A1 is a round that has a warhead from the Ballistic Burst Missile attached to the shell body. This ultra-high explosive shell is used as a city killer round just as much as it's used as a conventional attack munition. Using an SGM-142B warhead, this round has an explosive yield of 6kt. Not commonly used, it's typically aimed at enemy bases, modified hard points such as mountain embedded bunkers and fortresses as well as enemy cities.
=== Specialty Rounds ===
Specialty rounds are munitions that are purpose built for very specific tasks. They don't fit within the standard munition production lines.
==== RGSM-MY2E1 ====
The Rail Gun Shatter Munition - Medium Yield round is a medium yield experimental explosive munition that acts much like a super-massive air burst artillery shell.  The weapon is fired over a designated area and the munition is detonated using a mixture of high-explosive compounds located inside of a very tough exterior shell that will shatter on explosion and drive the variable size molten fragments down toward the ground and around the munition with blistering speed.  The fragments will punch through even heavy armor with terrifying ease and will tear apart any infantry that happens to be in the area of effect.  The splintering fragments also will tear apart any aerial targets in a 500m radius of the detonation.
==== RGAB-LY1A1 ====
The Rail Gun Air Burst - Low Yield munition is a low yield explosive situated behind a large conical chamber filled with tungsten balls. Referred to by the infantry as "Scatterblast Rounds", these rounds serve as infantry killers and they are programmed to detonate about 50 feet above the ground in order to give the tungsten balls a chance to spread out over a decent area making a killzone that's increasingly difficult to get out of. These rounds are usually detonated above areas where conventional explosive rounds may be less effective, such as fortified trench networks, urban neighborhoods, dense forests or open areas where troops are spread out. The air burst height can be adjusted for various needs, with changing effectiveness based on that height. Unlike other munitions, this one is directly affected by the physical location of the orbiting ship. If fired at enough of an angle, the shrapnel from the explosion will scatter over a wider, more extreme area. This can cause unintended damage if not properly accounted for. 
==== RGEM-P2A3 ====
The Rail Gun Electro-Magnetic - Pulse round is a limited scope specialty round that is used in instances where large-scale disablement of electronics is required such as bringing down a defense network or missile shield.  It can also be used to disable vehicles in the impact area and can inflict heavy damage to electronic systems on enemy capital ships.  The actual blast radius of the EMP is relatively small compared to the radii of other munitions, so in many instances multiple hits in multiple locations with these munitions are required to result in a cascade failure that would bring down defensive networks.
==== RGAR-B1A6 ====
The Rail Gun Apocalypse Round-Burst is an experimental munition with a nuclear payload as it's primary explosive. This weapon is currently in testing in order to determine the effectiveness of putting nuclear tips onto rail gun munitions. While originally concepted as an anti-capital ship weapon, it's equally effective when used on planetary targets. Capable of causing catastrophic levels of damage, these rounds are tightly controlled and are only used in special circumstances. The blast yield of this munition has been measured at around 13kt.
==== RGAR-B2A4 ====
This munition is a variant of the RGAR-Burst. Even more experimental than that, this munition is tipped with a miniaturized thermonuclear warhead. Using molecular compacting technology acquired from Chandelier, AcDragonia was able to shrink a thermonuclear city killer into a small enough package to fit onto a rail gun slug. This weapon's explosive yield has been measured at 1.34 Megatons.