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September 6, 2012
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Mark 61 Magnetic Accelerator Rifle (WIP) by ScrewfaceRomeo Mark 61 Magnetic Accelerator Rifle (WIP) by ScrewfaceRomeo
(Still a WIP)

While the majority of Systems Protectorate Forces are drones, human Infantry are occasionally required, and with them, conventional assault rifles. The Mk. 61 MAR or " Protectorate railgun" fills that role, serving as a standard issue long arm for Police, security guards, and officers in the field. Assault troops and Special Forces, on the other hand, carry the larger Mk. 86 OICW, which combines a Mk. 61 action with a semiautomatic 25mm guided antimatter missile launcher. Mass produced and issued in the thousands, Mk. 61s are by far the most common long arm in Known Space, used by both the Protectorate and rebels, as well as the militias of some Free Systems.

The Mark 61 MAR is a solenoid-actuated, fully automatic, rifled magnetic accelerator weapon. Its action works as follows:

1. barrel is pulled backward, stripping a slug from the magazine into the chamber.

2. an electric current from the capacitor banks is pulsed through the "rails" printed onto the barrel, expelling the slug at either ~Mach 5 or just below the speed of sound (this allows the weapon to fire in almost complete silence, but significantly decreases power compared to the supersonic setting)

3. The solenoid propels the barrel forward and back, stripping another slug into the chamber.

4. The process repeats.

The MAR fires a 10x35mm hollow-tipped, tungesten cored, pointed steel slug from a 30 round detachable polymer magazine, capable of defeating most conventional body armor and with sustained bursts even the powerful Combat Exoskeletons and Infantry Drones of the Protectorate Military. It's barrel is made of ceramic composite surrounding a rifled steel inner barrel on which 6 electromagnetic rails have been printed by magnetic nanoparticle printing. This is mounted within a solenoid which moves the barrel to cycle the action. The weapon's body is made of an advanced nano-composite, the interior of which is printed with the capacitors and circuitry which make the weapon function. Mounted ontop is a carry handle with built in backup iron sights in case of helmet failure, a laser sight/rangerfinder, and a digital "scope" which connects wirelessly to a solider's eyepiece or helmet. The weapon also has a folding stock and magnetic hardpoints on the sides, top and bottom for mounting equipment, such as guided missile launchers, sonic rams, forgrips or laser cutters.

Like all Protectorate weapons, the Mark 61 incorporates an advanced Identify Friend-Foe system, which both prevents the weapon from firing in the hands of a non-authorized user, and prevents the weapon from firing if it is pointed at any Protectorate Personal or Drones. This system was first designed in 2056 for American police weapons, and modernized in 2167 by "Levy" Artes'ranna, a Follower savant working in the Protectorate's Smart Weapons division, now gone rouge. Normally, this would make the Mk. 61 useless to rebels, but with Levy's help a countermeasure was developed which allows anyone to use the weapon against anything, with a bit of reprogramming. Free Systems programmers have also cracked the program locks, and blackmarket "cracked '61s" go for a premium on some Protectorate worlds.
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:iconcityofthesouth:
cityofthesouth Featured By Owner Sep 7, 2012
cool ... your line art is rocking hard.
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner Sep 7, 2012  Hobbyist General Artist
Thanks!
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:iconczechbiohazard:
CzechBiohazard Featured By Owner Sep 7, 2012  Hobbyist Digital Artist
Awesome concept. I really like the lower assembly. The trigger is pretty awesome too. I can't wait to see the final project. :D
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner Sep 7, 2012  Hobbyist General Artist
Thanks. Yeah, I based it somewhat on the ACR, with a touch of SCAR-L and lots of FUTURE.

I'm going for a whole range of these, with an OICW, sidearm and PDW in the works. With all the... other... Benefits of sci-fi :P
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:iconczechbiohazard:
CzechBiohazard Featured By Owner Sep 8, 2012  Hobbyist Digital Artist
You're welcome. Yeah, I could see that, although it did slightly remind me of the Scorpion Evo III. ;)

Yay, awesome. :D
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:icontounushi:
Tounushi Featured By Owner Sep 7, 2012
Is the weapon EMP proof?
The reason I usually go for projectile weapons driven by chemical propellent instead of infantry rail drivers (though one model is in the concept stages) and DEWs is because the bullets can have advanced materials used in them and the weapon is totally EMP proof. And I give my forces EMP grenades to further press this advantage. :)

On a design note, the magazine looks rather long. Is it because the slugs are a full centimeter in diameter? Would there be enough room to dual-stack them or quad-stack them? Magazine length affects prone position firing, especially if the magazine can be used as a monopod.
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner Sep 7, 2012  Hobbyist General Artist
All Protectorate gear is EMP shielded, when the majority of your military is drone-based that becomes a nessesity. Though, they almost never encounter anyone with the tech level to compete with them. Plus, the extra velocity of the MAR allows it to defeat power armor more easily, not to mention swapping between super and sub sonic with a button press.

Oui. I based it's length on a HK 10mm Auto 30 round magazine. It's already a double stack, I suppose quad could be feasible though
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:icontounushi:
Tounushi Featured By Owner Sep 7, 2012
The Republic military as well as her rivals use significant automated forces, but the Republic especially still relies on boots on the ground, supported by a heavy EW department. Why have thousands of drones if one set of computers can disable or hijack them? Plus EMP proofing ratings change on very short industrial timescales. Thus rather conventional tactics exist as combined arms on planetary surfaces while starships provide either ground bombardment or denial of enemy's ground support. Each infantryman is given a primary, secondary and side-arm. Primary is always a rifle, secondary is always a light PDW and the sidearm is always a pistol with two mags (ammo commonality with sec. weapon is encouraged). The type (projectile, rail driver or blaster) of each is decided on the brigade level.

But to bounce some ideas on the mass driver, I was having a "sandblaster" concept for an infantry rail driver (for tactical versatility and variety along the regular rifle and DEW), with ~6mm pellets driven three at a time at M.7, with the first round shattering armor (and the pellet itself), the second penetrating and the third expanding/exploding in the narrow permanent cavity.
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner Sep 7, 2012  Hobbyist General Artist
Protectorate Drones use optical wiring rather than electrical: it's faster and EMP proof. Complex electronics are sealed in EMP-proofed casings within the main housing. Hijacking is still am issue though, but luckily (or unluckily) the Protectorate almost never picks on someone their own size, mostly because there isn't really anyone their size. Of course, when you have a rebellion partially led by the person who programed and modernized most of your anti-intrusion algorithms....

Generally, enemy resistance is crushed by ariel and infantry drones, combined with orbital battery and rail artillery, then infantry drones and human troops root out any remaining pockets of resistance. If the enemy continues to make trouble, they evacuate the cooperative prisoners and crack the planet. This has only happened twice, but it makes species think twice about making trouble for the Protectorate.

Three weapons seems a bit much: Protectorate troops usually carry an OICW and a sidearm, both of which can share Kinetic ammo, and have automatic settings. Hence, the sidearm functions as a PDW. Grenadiers (one per squad) carry a heavier antimatter guided missile launcher for knocking out fortifications. Infantry Drones of the Pariah Mk.5 variety generally carry a built-in belt-fed railgun firing the same 10mm slugs as infantry rifles from an integral ammo drum in their chassis, combined with a missile launcher mounted on the shoulder. The larger Paladin's main arm is a 30mm, automatic antimatter shell cannon, capable of chewing through tanks (which, thanks to widespread use of guided antimatter-based weapons, have fallen almost completely out of use), fortifications and infantry alike.

Actually, that's basically the function of the Mk. 61's "2-burst" setting: it fires two rounds in tandem at 1800 RPM, first one smashes armor, second causes terminal damage. Otherwise, ROF is 800 RPM. Based it on the AN-94. Smaller, 5mm flechette -based railguns generally fire in tribursts, but the big ole 10mm rounds negate the necessity of a third round.
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:icontounushi:
Tounushi Featured By Owner Sep 8, 2012
Basically if I can compare infantry armament to a modern equivalent, it'd be G36 + MP-7 + HK UCP. A medium automatic weapon, a light SMG and a pistol. A brigade can decide if in what combos the soldiers go: assault blaster + projectile PDW and pistol or projectile rifle + blaster microcarbine and pistol.
SAW gunners do away with the PDW.

Squad-level infantry drones are only used for SitAw and as a comms relay.

I have a tank design, but its armor is totally modular, with hardpoints for active defenses. A specialized shield vehicle can deflect projectiles and particles (though certain alloys and energy fields can penetrate the shield bubble). Plus a standard EW suite in the vehicles can mess with guided weapon electronics. In some cases even doing a return to sender.

On the "sandblaster" concept I was inspired by the Mass Effect weapons, but instead of one slug per shot, it's three pellets in a linear group. Burst and full auto fire would actually be triple bursts in quick succession. Standard would be shatter-penetrate-expand, but those can be changed on the fly. Sometimes even adding "elemental" damages, like super-cooled pellets, super-heated pellets or electrically charged pellets.
Standard projectiles are typical line infantry gear as they're totally EMP-proof, but DEWs are more useful in areas where over-penetration is a greater concern, and mass drivers are useful in highly variable combat environments, where a computer setting is faster and/or more efficient than a magazine swap. Army brigades are usually static, so they pick a primary from these three and a DEW or projectile secondary for versatility. As long as there's at least one electronic weapon and one non-electronic.
Commandos and marines choose by mission, though marines fall more on rail drivers by default.

But as you've noticed, I put immense emphasis on EW and EMP use and resistance. That's why I put electronic weapons as standard unit armament ONLY if their firepower and versatility benefits clearly outweigh their inherent EW and EMP vulnerability.
If we can take Mass Effect as a thought experiment here again, could you imagine the sabotage skill working on a fully mechanical weapon as well (if at all) as it does on the computerized and highly electronic weapons in the game?
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