Solyhniya is offering a multimillion credit contract for the domestic production rights to a brand new SMG design.

- The weapon must be capable of semi-automatic, automatic and burst fire.
- It should have a high level accuracy, so designers are advised to maximise barrel length, perhaps with an Uzi-style receiver or a bullpup configuration, but these are by no means essential.
- Low weight is important, so the weapon should highly comprised of synthetic polymers.
- There should be longer and shorter variants, including a compact version suitable for security and spec ops purposes.
- The weapon must be chambered for the 10mm auto cartridge. If an overpressure variant can be easily facilitated, even better.
- New designs will likely be favoured over reused designs.

Should a designer over a solution to this contract, or require an further information, they should immediately contact Solyhniya either via telegram or via e-mail (solyhniya@googlemail.com).

Good luck!

Weight: 3.1KG
Length: 440mm (collapsed stock) 610mm (extended)
Barrel length: 275mm
Cartrige: .400 (10mm)
Action: Blowback, telescoping bolt
ROF: 560 rpm
MV: 415 m/s
Effective range: 120m
Feed system: 10, 20, 30, 40, 50 rnd box
Sights: Rear V-notch, front hooded post.

Couldn't really think of much of a write-up, it's for you to use.

EDIT: I know some of the parts of the weapons aren't aligned properly, this happened when I grouped it all together!

Weight: 4.1KG
Length: 550mm (720mm with stock extended)
Barrel length: 300mm
Muzzle Velocity: 385 m/s
Effective range: 215m
Cartrige: 10mm, as per your request
Action: Blowback, Closed Bolt
Rate Of Fire: 660 rpm
30 Round Magazine, extended 45 round magazines can be easily manufactured if requested.
Has a easy to maintain red-dot sight, iron sights are available, if requested.

The above applies to the first to weapons (Which are both the same, simply showing the length of the stock)

The bottom weapon, however, is a .45 variant which our engineers have been experimenting with. It has two sub magazines encased within the one main, giving it a very large ammo capacity. It operates in a similar manner to the 10mm weapon that it is based upon, but with increased stopping power, muzzle velocity and rate of fire. It can fire up to 775 rpm, due to the barrel cooling mechanism covering the front of the weapon. This weapon is not the main entrant, the first two are.

The United Socialist States of Australien will almost certainly be utilising this weapon in the near future, we thought it best to present to you to see if it caught your interest.

Wait tandem feeders wat

Is this duplex ammo like colt ACR

I think you misunderstood it.

It's easiest to just think of it as two magazines in one, once one runs out, the other is used (Though, obviously, it isn't just two magazines in a metal box!)

But as I said, the first one is the main entry.

but how does the feed alternation work

But yeah, there's nothing I can see wrong with the first ones.

Need an SMG myself. If you feel like waiting, will come up with one for you.

Mind if I critique your requirments, first?

1a. Safe, Semi, and Auto should be fine.
1b. But since I like complicating shit, I'd just make a selective bolt-retarder for effecting cyclic RoF and implement a tigger-disconnect on both rates unless you REALLY crank the trigger down. (Slow = 300 RPM, Fast = 900 RPM)

2a. Yeah, pistol-grip mags... With 10 mm Automag clips things can get rather finicky...
2b. Seprate mag from grip, rearward extraction to allow for increased barrel-length, extra bolt-overtravel allows for constant-recoil principle to apply in conjunction with API delayed-blowback. This resaults in a large-ish bolt.

3/4. Sure... I can do that...

5. Ability to cycle overpressure... Maybe if you leave the bolt-retarder on... Though I'd suggest single-shots...

6. Sure, I could get you a pimpgun graphic too... But I'd rather get working on a write-up instead...

---

This app should look familiar to those who remember my old storefront.
ICly, I relaced this with the LAR-655A3, if you needed a hint.

The feed alternation is rather simple, when one part of the magazine runs out, the next part clicks in and starts to fire. It'd have a delay between switching of about a second, but that's a lot quicker than reloading the weapon.

And there isn't any fancy mechanism for putting a fresh magazine in, it goes in just as any other would.

Why not just use a helical magazine?

Or, if you're feeling sexy-awesome crazy, a side-feeding pan-mag.

This is cheap, simple and it's how I've designed it.

Unless someone requests a variant with your addition, it stays as it is!

(But a side-feeding pan mag does sound sexy...)

That does sound quite mechanically complicated actually.

usually in a amagazine all you need is a spirng to exert froce upwards and a catch to hold the magazine in place. With your forward/rear twin column design you also need a system that will keep the forward stack/col in place until the rear stack is exahusted and then move that stack backwards and some how move the now fully extended rear spring out of position, you will also need a strong and longer catch mechanism to keep the heavier/larger magazine in place.

Also when comparing .45ACP to 10mm Auto the 10mm round does come out on top in terms of muzzle energy and thus stopping power and muzzle velocity.

Sounds pretty good. I'm seeing a sort of MP5 with nobs on here, which will be great for law enforcement.

A write-up is important, of course, but stress yourself out too much with a history etc. You won't have to "sell" the product in your write-up, but simply explain what it does.

By the way, unless you're seriously good with PMG I doubt you'll be able to come up with anything decent. I've tried, but SMGs never look very good; my best attempts are all PDWs.

By the way, why would the 10mm not work in an Uzi receiver? Recoil issues?

1. Actually, less knobs, and no safeties. A lot of the features of Hurtian-arms are hardwired into the trigger-pull itself.

2. Well, in the failthread the thread on NS regarding most popular weapons, I believe I covered the Bastard's downfall in spite of it being cheap, lightweight, and powerful.

3*. I'm not. I'm likely just gonna tell ya'll it looks like a [insert gun here] with the ejection-port behind the handgrip (or use forward ejection), with the mag forward, and then tell you that the bolt extracts a round from the mag before it ejects the spent casing through a very entertaining bolt that appears to have sex with itself while it's buddy called the bolt-group power-rapes the magazine.

4. Actually, it's cartridge width and how wide you can make a pistol-grip before you require humoungous hands. A 10 mm is bsed on the .40 S&W, and is of roughly same dimensons. The .45 historically is fed single-column in pistols because of the width-issue. Single column high-capacity magazines jam upon very little prevocation, which is why the M1928 Thompson wasn't as popular with gangsters or soldiers.

9mm can be staggered, which makes it pretty nearly immune to bent-mag jams.

*There is, in fact, a compact-pistol that does this, reliably. And the Russian AN-94 assault-rifle has an equally complicated feedway-que. As does just about every Soviet-era GPMG.

I might be able to put something together...

Well I'd imagine it'd be fairly simple, when the first 'magazine' runs dry, a spring could just push it back (It could collapse as there's no bullets left in that part) and the second part would be pushed into place.

I get that you said "historically", but what about the USP45? That 12 round mag has to be double-stacked, right?

Have you ever held a USP .45? They are gigantic. A Compact USP is the size of a normal pistol o.O

Actually, that could just be from adding an inch or two to the handgrip's length.

Double stack 10-rd .45ACP mags fit flush with a Para-Ord P10-45

Just from the pic I ask myself... "Nice gun, but what am I supposed to hold onto?"

@ Aust: Why not just manually slide the magazine back? Or use a wider double/staggered-column mag?

A manual slide could work (And it'd probably be included if field testing had proved the automatic option unreliable) but the current system works fine, imo. It's simple, one part runs out, with no bullets left to support it the empty side collapses/folds under because of the spring in the magazine pushing at the other side, this pushes the rest of the rounds into place.

Does anyone see any major problems with this? I'd appreciate it if you could point any out!

Sit down and draw a simple diagram of what you envision and you will see the major issues.

Mainly that such a system will be bigger and heavier (not to mention much more expensive) than a pair of normal magazines, clocking in at roughly 2.5 to 3 times the size/weight of a single magazine. More moving parts also equals more to go wrong.

Normally magazine springs don't expand far eough to actually fold flat against the back of a magazine, doign so will likely put some pretty nasty tensions on the spring and will result in the spring having to protrude from the bottom of the magazine. Then there is the follower, the bit of metal/plastic which sits between the srping and the cartridges and keeps everything nice and aligned. The follower is also going to have to be moved out the way.

It isn't a terrible idea, it just is not going to be anyhwere near as smooth and flawless as you imagine. Moving magazines/ammunition laterally (i.e. to the side) is a bit easier and has been done by the Italians and the japanese in soem of thier delightfully odd MGs.

That (VERY poorly drawn!) pic pretty much explains what I'm trying to say.

But let's not threadjack this any further, so I'll reiterate: The first two are my submission, the 3rd weapon is not!

I'll probably be creating a thread on the other weapon so I can seek advice on working it out.

Australien: I'm certainly no expert on the matter as Ive been out of the game for awhile, but I'll tell you plainly that a magazine spring and follower will not compress like that. Modern magazine feed systems are surprisingly robust in order to ensure reliable feeding, and anything lightweight enough to be pushed out of the way will have reliability issues. Complexity wise; Even if they can be made to be pushed aside it will most likely prevent proper alignment of the second magazine and cause jams.

That being said; if you can find a good book on experimental British Sub machine guns the Vesely V42 DID successfully use a 60 round tandem mag similar to your design, but I believe it used a linear feed with fixed 'feeder rounds' (ala C-mag) that funneled the rounds of the second column up and through a single exit without the need for additional springs or mechanical components. Hopefully that helps.

My apologies to the OP for the hijack, Id meant to take this to his design thread but couldn't locate it.

OOC: Is this still open? I'm not good at statistics.
IC:

We present the DSMG-M1, or a longer version, Dimoniquid Sub-Machine Gun - Mark 1. This submachine-gun was made by The Nano-Generation Corporation, where it was made from past guns, and guns that were meant to be made, but weren't given the go-ahead. We heard your call, and we responded.

DSMG-M1


DSMG-M1, and a DSMG-M1 Tactical

As you stated, it has a bull-pup design, although it isn't placed within the grip, and it uses the 9x19mm cartridge, much like a Heckler and Koch MP5 Variant series. It doesn't have an overpressure series, although the standard magazine holds either ten, or thirty rounds, so perfect for close combat, or special operations. The main frame is very lightweight, although the stock is slightly heavier. We are currently trying to develop a folding-bullpup series, although designs are currently at a stand-still with this current production, and a longer variant is currently available.

Any question?

1) Backward slanting magazines=feeding hell
2) Action?
3) Dimensions + weight?

OOC: I'll try my best... here it goes.
IC:

2. Gas operated.

3.
Overall length: 690mm (Not sniper variant)
Barrel length: 420mm (Not sniper variant)
Caliber/bullet: 9x19mm
Weight: 2.63 kg.

1) Why would you need a gas operated submachine gun? 9mm Para is well within the realm of blowback operation.

2) Why in God's name would you need it to be that long, and why would you make a pistol-caliber sniper rifle?

Here is where the thread is for my smg is at.

But just to remind Solyhnia, The First Two Weapons Are My Submission! Not The Third!

Bumpeh.

bump

Model 10 Sub Machine Gun-

The Model 10 is a double-action gas-operated rotating-bolt weapon, more akin in design philosophy to a light assault rifle than a common sub machine gun. Designed by the same group responsible for the Model 19 Semi-Automatic Shotgun, the Model 10 was designed to be a full size sub machine gun similar to the MP5 or other fixed stock sub machine guns. Its powerful round being given the maximum possible potential due to its long barrel and high accuracy in either semi-automatic or fully automatic mode. The Model 10 like the design groups Model 19 shotgun is a simple yet robust weapon, utilizing the latest in materials science and design from Argus International Manufacturing in order to provide the highest grade product to our customers. Its long barrel high magazine capacity powerful cartridge and compact size have given the Model 10 a reputation for accuracy and firepower in law enforcement and military units that have adopted it, slowly winning over their more conservative peers.

The Model 10 uses a long stroke gas piston that is fixed to the bolt carrier, the resulting added forward mass improves the reliability of extraction, and ejection. The piston face is slightly concave, the edges of which are polished in order to scrap the walls of the recoil tube free of debris on the forward stroke of the piston. A screw based gas valve allows for the operator to adjust the amount of firing gasses that reach the piston based on the atmospheric and situational requirements. When removed, the gas valve allows accumulated fouling and debris to be removed without disassembling the weapon, simply by pulling back on the cocking handle and letting it forward slowly so as to force the accumulated fouling out of the gas system, then reinstall the gas valve. The weapons cocking handles are duplicated on either side of the receiver and are fixed to bolt carrier allowing them to act as both a cocking handle and a forward assist as needed. Cut outs in the receiver are slightly longer than the bolt carriers travel so as to reduce impact stress on the polymer housing that comprises the body of the weapon and reduce the noise of the operation.

A double action design, the Model 10 is capable of being carried safely for long periods of time; loaded, cocked and ready to fire while still maintaining instant combat readiness with only a long pull of the trigger. After the heavy crisp trigger pull for the first shot, all subsequent shots are in single action mode with subsequently lighter trigger pull. A double action mechanism was chosen for its intended market; police and non-front line military personnel where a weapon may go for long periods of time without needing to be fired and be suitably bumped around in everyday use, yet needs to be readied to fire at a moments notice. The safe position on the ambidextrous selector switch not only disconnects the firing sear but also acts as a decocking lever, allowing the weapon to be loaded and then made safe in order to be stored or carried without risk of a drop or bump fire. This safety is double important for those who cannot carry a larger weapon or operate in crowded areas as an accidental discharge can be not only a tragedy, but a potential PR disaster for a police force.

Working components of the Model 10 are Melonite and QP Salt Bathed Nitrocarburized (SNC) to produce a naturally scratch resistant, dry lubricated surface that provides three to four times less friction than hard chromed surfaces allowing the weapon to operate without additional lubrication for long stretches of time without undue damage to its working parts. Barrel wear is likewise decreased allowing the weapon to serve with distinction for several years before needing to be refitted.An enlarged Claw extractor covers nearly forty percent of the shells rim allowing for positive and secure extraction with reduced chance of rim separation. These features combined with its strong self regulating gas piston and overbuilt magazine allow the Model 10 to operate in hundred of unwelcoming environments and perform the role it was designed to do. Four large hardened steel locking lugs on the bolt ensure a a strong locking action of the breach that is better resistant to the high heat and repeated abuse during firing compared to using multiple smaller lugs. Oiling and other regular maintenance however is recommended in order to increase the weapons service life, Its ability to go without lubrication is to survive unforgiving combat conditions is a boon to the operator, but it is not an excuse to forsake maintaining the weapon. These features combined with a fluted chamber ensure reliability in adverse climates and conditions that go far beyond normal battlefield debris.

Furniture for the Model 10, like all Argus small arms is constructed of long lasting tough materials designed to thrive in any environment. The body of the Model 10 are made of Impact-modified, long fiber reinforced thermoplastic, A high temperature, high strength polymer that though it does not take the firing stress of the action directly reduces the weight of the weapon by replacing the heavy stamped steel exterior used on most contemporary sub machine guns. The polymers increased Specific Tensile Strength (KSI) over Steel (ASTM A131) and Aluminum (6061-T4), and reduced wear due to vibratory stress increases the service life of the weapon without sacrificing reliability in the field. Grip surfaces are pebble-textured to provide an excellent grip and strength regardless of how wet or slippery an environment the operator is stationed in without being overly abrasive. The ventilated fore stock provides mounting points for two additional Rail Interface Systems (RIS) at three o’clock, and six o’clock. These rails are of M1913 specifications like the top rail and can be easily removed when not needed. This allows for a plethora of accessories to be mounted to the Model 10 with little downtime between installation and implementation. All major parts are solid molded to fit, and provides a matte non-reflective solid color that does not wear off with age or use like painted or blued steel would.

An ambidextrous selector switch is located directly above the pistol grip, and is easily adjusted among the three firing options with the thumb of the firing hand. The magazine release is located behind and above the pistol grip, and can be released by either the off hand while gripping the magazine, or by the firing hands thumb. The magazine release is slightly inset into the body as as to prevent its release if bumped from the side reducing unintended magazine releases in combat. The magazine well is also flared in order to guide the magazine into the weapon making reloading both quicker, easier and reducing loading errors. A fairly long shallow feed ramp is set below the chamber, its shallow angle combined with its flared base, increase the weapons reliability and reduce jams caused by improper feeding. With the increasing importance of ambidextrous controls and conversion for left and right handed users can be as expensive as building a special weapon for left handed users, or in the case of the Model 10, swapping out a section of the upper receiver and bolt for left handed ejection means little overhead cost to the operating force.

The barrel is positioned along the line of impulse allows for more comfortable absorption of the weapons recoil impulse, and reduced muzzle climb. This combined with the weapons padded butt-plate means better accuracy and shooter comfort during training and in the field. The gas piston is surrounded by the bolt return spring, this combined with an enveloping bolt carrier helps keep the rearward travel of the weapons bolt to a minimum, increasing barrel length proportionally. The use of a rotating bolt and gas operation allows for more than just taming the recoil force of the high pressure 10mm auto round and its derivatives, the strong locking action of the rotating bolt means that the resulting moving mass of the bolt and bolt carrier is lighter than the bolt used in a traditional blowback weapon, reducing recoil and muzzle climb due to a decrease in the weapons center of balance. Components that would normally interface with the receiver of the weapon attach to an investment cast and milled receiver insert adding additional strength to the polymer receiver, and since the receiver insert is treated with the same low friction high strength surface treatment there is less friction and thus less wear than if the components had interacted with the receiver alone.

The box magazine used by the Model 10 is constructed of the same reinforced polymer as the body of the Model 10, thin internal steel reinforcements to increase its rigidity without increasing its weight significantly. In order to provide the best compromise of corrosion resistance fatigue resistance and strength, the magazine uses a heat-treated triple braided stainless steel spring. A compression stop on the bottom of the self leveling follower prevents the spring from exceeding its elastic limit and allows for long term storage of rounds in magazine without the worry of loss of reliability. The rear of the magazine however is made of a clear polycarbonate allowing the operator to easily see how many rounds are available in the drum at any one time. The self leveling follower of the magazine is constructed of high density polymer that’s Teflon coated for dry lubrication and is dyed one of several bright colors, neon orange being the most popular due to its visibility in the rear window. The edge of the follower are beveled to prevent forcing grime into the action of the weapon, this bevel also acts to scrap down the sides of the inside of the magazine during loading so as to ensure a the smooth travel of the follower and ammunition during firing. The resulting debris can later be removed easily during regular maintenance.



Specifications-
Type: Self-Loading, Magazine-fed, Sub Machine Gun
Operation: Select-Fire, Rotating Bolt, Gas Operated
Action: DA/SA
Manufacturer: Argus Industrial Manufacturing Inc, Kingsport, Amastol
In Production: 2010/2011-?
Caliber: 10mm Auto (10x25mm), or .360 Auto (9.5x25mm)
Weight: 2.45 kg (unloaded)
Capacity: 10, 15, and 30 round polymer box magazine
Fire Modes: Safe (decocker), Semi-Automatic, Fully Automatic
Rate of Fire: 680 rpm (cyclic)
Muzzle Velocity: ?
Effective Range: < 150 meters
Maximum Range: ~250 meters
Safety: Drop Safety, Decocker, Manual safety
Trigger Pull: 9 lbs (DA) 2.8 lbs (SA)
Barrel: SNC-treated, Cold Hammer-forged
Rifling: 5 Groove right hand twist, one turn in 16 inches
Furniture: Impact-modified, long fiber reinforced thermoplastic
Dimensions-
OAL: 570 mm
Barrel: 278 mm
Length of Pull: 310 mm
Width: 52 mm
Height: 200 mm
Accessories-
Sling (included)
Sentinel Holosight (included)
Stonewall Back up Iron Sight (BUIS) system
Side Mount RIS-kit
Model 30 TLI with Pressure switch
Muzzle brake/Flash-Hider
Model 2020 Suppressor
Forestock Light Kit
Price: 1200.00 USD per unit