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August 14, 2012
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MBR-13 Revamp, Mod. 5 PDW by ScrewfaceRomeo MBR-13 Revamp, Mod. 5 PDW by ScrewfaceRomeo
PDW MBR-13, shorter than an MP5, with a longer barrel than an M4A1 - god I love bullpups... Chambered in delicious 7mm optimum rounds, as per usual
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:iconcerberus116:
Cerberus116 Featured By Owner May 8, 2013
nice design!
it would be nice if you convert it to 6x30mm Valkyrie and market it as an PDW, to military and Law Enforcement Forces (it would be akin to the "Peacemaker" of Call of Duty: Black Ops 2)
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner May 8, 2013  Hobbyist General Artist
Is that a CoD caliber? Because I stopped playing CoD after the "AK-74U" tragedy.
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:iconfreelancer521:
Freelancer521 Featured By Owner Feb 19, 2013
Any paticular reason for the 7mm?
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner Feb 19, 2013  Hobbyist General Artist
I'm glad you asked. You see, 7mm is the optimum diameter for rifle cartridges. 7mm rounds give a 20% advantage in ballistic performance for any given level of recoil over 7.62mm rounds, because they have a far superior ballistic coefficient. And they can retain their energy at much longer ranges than 6.5 or 5.something rounds, while also delivering more kinetic energy to the target at any range. For example, the 7x43mm .280 British retained more energy and penetrating ability at range than 7.62x51mm NATO, and was also more accurate and had a flatter trajectory.
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:iconfreelancer521:
Freelancer521 Featured By Owner Feb 19, 2013
So bottom line, 7 mil beats out 7.62, 5.56, and other more exotic ammo because it can retain its energy in flight while loosing it when it hits the target? Does this carry over to different ammo types within the 7mm family(hollow point, jacketed, etc.)? Also, what is the source of this information, if you don't mind me asking?

Thank you so much for your prompt response. I greatly appreciate your input and explanation.
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner Feb 19, 2013  Hobbyist General Artist
Basically, yes. What it boils down to is that 7mm diameters will bring one closer to a Sears-Haak body than 7.62 or above, while retaining more energy than smaller rounds. Yes. It's a function of the dimensions of the bullet, not the composition thereof. Sources are varied, but here's a few; [link], [link] (data on the .280 British) and the Wiki page for .280 British will offer some interesting info as well. A lot of it is actually just math done with ballistics calculators though.
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:iconthelivingredbaron:
TheLivingRedBaron Featured By Owner Sep 6, 2012  Hobbyist Traditional Artist
This is the Russian opposite. Korobov TKB-022 assault rifle. except in a larger caliber, of coarse.
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:iconscrewfaceromeo:
ScrewfaceRomeo Featured By Owner Sep 7, 2012  Hobbyist General Artist
?
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:iconthelivingredbaron:
TheLivingRedBaron Featured By Owner Sep 7, 2012  Hobbyist Traditional Artist
It was a design with the same design goals, and for all we know, the TKB-022 experimental assault rifle worked well. Just thought you might find the weapon interesting, that's all.
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:icondeftcrow:
DeftCrow Featured By Owner Aug 17, 2012
And that's a lot of Magpul stuff. Seems like a good thing.
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