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May 10, 2012
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M83 DMR (Old, Gen-3) by SomeNavySEALs M83 DMR (Old, Gen-3) by SomeNavySEALs
:iconcommentplz:
Another variant of Grayson Arms' ICR platform the M83 is a scaled up version of the the M12. The United States Marines Joint Munitions and Lethality Contracting Center put up a requirement 506 after an error showed showed an extra ten thousand MK-33 rifles that were not there. Adopted after less than a year of development and testing spring 507 it still serves as the primary medium range marksman rifle of the United States Marines. It is the first combat rifle chambered in the 9.3x70 Lapua or Raufoss Magnum cartridges, made controllable with the ICR's collapsing bolt system.

Contrary to its sniper rifle like appearance it is not a dedicated sniping weapon. One is issued per squad in standard Expedition units and two per squad in SOC units. It gained strong popularity amongst Juno's segregated Pathfinders and became emblematic of the 3rd Pathfinders half-female recon detachment.

"BOOM 'ead shot, motha fucka!"
"I think you're enjoying this a little too much, Cpl."

Cartridge: 9.3x70 Magnum +P+
Action: Gas-operated direct impingement, collapsing bolt
Rate of fire: Semi automatic
Muzzle velocity: 4,150 Feet Per Second
Effective range: 1500 yards+
Feed System: 10 round detachable box mag

*pissed off snarl* Muzzle break by "Travis-Legendary"
Rails by Hitman_sa_47

I am now taking requests
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:icongool5000:
gool5000 Featured By Owner Oct 1, 2012  Hobbyist General Artist
Very nice. Kinda lol'd when I saw the ship name. My dad was a sailor aboard the first Iwo, in the 70's
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:iconarchertacticalops:
ArcherTacticalOps Featured By Owner Sep 14, 2012  Hobbyist Digital Artist
Design is great.
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:iconkahunasniper:
KahunaSniper Featured By Owner May 12, 2012  Hobbyist Writer
I really do like this design, but I have to ask. Considering the 9.3x70 Brenneke and it's capabilities, moreover what it's usually used for, why would you use it? The 9.3x70 isn't a dedicated DMR/sniper round at all, moreover. And why have the barrel that long on a bullpup? It looks about as bulky and heavy as a Barrett M-107 without the capabilities the .50-cal. round provides.

Just thoughts. =)
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:iconsomenavyseals:
SomeNavySEALs Featured By Owner May 12, 2012  Hobbyist General Artist
It's pretty much a 8.58x70 Lapua magnum cartridge with a 9.3 Brenneke bullet. The reason for the overkill barrel(it was fluted but it's really hard to see, that was to keep the weight down of course) and muzzle break is that the 9.3x70 Lapua-Raufoss is extremely overpressured to beyond that of modern proofing rounds. I've always liked long barrels on bullpups because of their space saving advantage they can have a barrel half again longer than a weapon of the same length and, well... look badass.
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:iconkahunasniper:
KahunaSniper Featured By Owner May 12, 2012  Hobbyist Writer
Well, yeah. But, what's that on there, a 28-inch barrel? That's overkill in the wrong manner for something that's only a DMR. But, the whole 9.3 round was designed for African heavy game kills. It lacks both penetration capability, at long range, and long range ability because of ballistics. The .50-cal. would out-preform it hugely.

But, that's the real-life version. What modifications did you plan on making for compensating that issue?
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:iconsomenavyseals:
SomeNavySEALs Featured By Owner May 12, 2012  Hobbyist General Artist
The barrel (according to the measurements I just took)is about 30 to 31 inches, the extra length allows the pressure to build up.
That with an armor-piercing tungsten core, an explosive, an incendiary component, and excessive, shoulder maiming velocity should help overcome the drawbacks of the 9.3 bullet.

I should note that at this point (2335) true sniper rifles are generally rail-gun or Gauss coil assisted electro-thermal chemical([link]) weapons or the target is simply hit with a Rod-From-God.
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:iconkahunasniper:
KahunaSniper Featured By Owner May 12, 2012  Hobbyist Writer
Hm. Roger that. Interesting piece overall. Good work.
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:iconsomenavyseals:
SomeNavySEALs Featured By Owner May 12, 2012  Hobbyist General Artist
Thank you.

And thank you for questioning my decision(not sarcasm) I love answering questions and comments other than the obligatory "looks cool" ^_^
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:iconkahunasniper:
KahunaSniper Featured By Owner May 12, 2012  Hobbyist Writer
Yeah, not a problem at all. I work as a Defense Analyst, so when I saw the round and barrel length, I thought it was odd considering the capabilities and bullpup rifle-work. Figured I'd ask. =)
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:iconsomenavyseals:
SomeNavySEALs Featured By Owner May 12, 2012  Hobbyist General Artist
I guess that didn't answer the "why"...

I chose it because the standard issue assault/combat rifle of my forces is chambered in 7.62x51 NATO and the main battle is 8.58x64 .338 Winchester Magnum so for the squad marksman I needed a little more kill than those. The standard issue rounds for the M83 are pretty much Raufoss MK-221 ([link]) rounds scaled down to 9.3mm. The reasoning for all these insane overmurder rounds is due to the nature of the combat my MEB Marines are fighting.
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