MODEL 10 | SUBMACHINE GUN
Type: Self-Loading, Magazine-fed, Sub Machine Gun
Operation: Select-Fire, Rotating Bolt, Gas Operated
Manufacturer: NH Government Armaments, Halpo
Calibre: .45 ACP.
Capacity: 30 or 50 round polymer magazine
Fire Modes: Safe (decocker), Semi-Automatic, Fully Automatic
Rate of Fire: 600-700 rpm (cyclic)
Effective Range: 100 to 150 meters
Safety: Drop Safety, Decocker, Manual safety
Trigger Pull: 9 lbs (DA) 2.8 lbs (SA)
Barrel: SNC-treated, Cold Hammer-forged
Furniture: Impact-modified, long fiber reinforced thermoplastic
OAL Length: 570 mm
Barrel: 278 mm
Length of Pull: 310 mm
Width: 52 mm
Height: 200 mm
Weight: 2.65 kg (unloaded)
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 operate as 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. Its long barrel, high magazine capacity, powerful cartridge options, 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. While uncommon in New Hayesalian Military service, it is issued to special forces units as the Model 15 personal defence weapon has been issued to most previous users of the MP5 submachine gun platform (for example, fighter pilots.)
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 scrape the walls of the gas 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. The weapons charging handle is duplicated on either side of the receiver and are fixed to gas piston, allowing them to act as both a cocking handle and a forward assist as needed. Cut outs in the receiver for the charging handle are slightly longer than their 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 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 while being suitably bumped around during everyday life, yet needs to be ready 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 the possible risk of a drop or bump fire. This safety is doubly 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 QPQ 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 thirty 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 allows it to survive unforgiving combat conditions and 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 of action in adverse climates and conditions that go far beyond normal battlefield conditions.
The barrel of the model 10 is positioned along the line of impulse, which allows for more comfortable absorption of the weapons recoil force, and reduced muzzle climb due to its linear travel. 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 mass of the moving components. Parts of the action 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 as the working parts; there is less friction and thus less wear than if the components had interacted with the receiver alone.
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, it 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. 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.
In order to better accept the variety of optics used in the field, a two-piece full length M1913 specification rail was added along the top of the weapon the front piece being integral to a reinforced upper fore-guard. The ventilated fore stock also provides mounting points for two additional Rail Interface Systems (RIS) at three o’clock, and six o’clock respectively. 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. 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 Kevlar reinforced upper receiver tapers slightly from the stock to just above the sight line of the weapon allowing for excellent cheek-weld for all height users, while increasing user protection the closer ones cheek is to the operating mechanism.
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.
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 contains a window made of a clear polycarbonate allowing the operator to easily see how many rounds are available in the magazine 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, day-glo orange being the most popular due to its visibility in the rear window. A new Self leveling follower improves on the older design by adding scalloped edge to the follower, allowing for decreased sliding resistance and increased grime tolerance over the solid bevel design of the original.
The Model 10 was designed foremost to allow an operator to excel in any environment asked of them, and to be of reliable action and firepower when needed. The Model 10 provides high capacity, high firepower, light weight, and strong shooter comfort in a standard length weapon that is easy to learn and instinctive to use. It the larger brother to the much more compact Model 15 SMG, and and a noteworthy companion to the Model 9 Pistol while sharing commonality of training, and ammunition with both. Though the largest of the Sub Machine Guns offered by Argus it is a die hard reliable platform for any personal combat role, and a suitable replacement for larger assault weapon to second line and logistic personnel or any member of the armed forces operating from a vehicle.