MODEL 12 | SHOTGUN
The Model 12 originally began its life as the 'Series 1 Shotgun' a private venture by Argus Industrial Manufacturing intended to be advertised to the Royal Riverine Patrol Force or RRPF as a secondary shipboard weapon for boarding suspected smuggling vessels and for ship based self defense. Unfortunately their timing was off, and by the time the 'Series 1' was ready for demonstration the RRPF had already used a large portion of their budget in acquiring new patrol vessels. The original weapon chambered for a three and a half inch ‘magnum’ shell showed promise on RRPF test ranges however and was approved initially as meeting their requirements before being rejected due to lack of funds. Not having any other customers lined up, and having put substantial funds into the program, the future of the project looked grim.
Attempting to alleviate program costs the Series 1 design was re-chambered for the more common 76mm shell then in use by law enforcement and civilian agencies. Dubbed the Model 12 the newly branded weapon for export became immensely popular in civilian home defense, and law enforcement markets in the closing months of 2007. In 2008 the RRPF, the military organization that had originally rejected the weapon due to lack of funds, purchased large numbers of the M128A2 and A3 models for ship based self defense and boarding actions. This order was quickly followed by Orders from the Armed Royal Air Force for a guard weapon for use in its numerous airbases. Though a strong contender for the ARAF contest, the Air Force eventually decided on the magazine-fed Model 19 Automatic shotgun since they were not as restricted by the size of the weapon as the RRPF was in its shipboard duties.
Adopted by New Hayesalia in 2008, the Model 12 serves as a specialist weapon seen most often with Airfield Defence Guards, Military Police, specialist members of the Royal Montmarian Guard, and Navy boarding teams.
The Argus Scattergun Model 12 also known as the Model 12, is a gas operated, semi-automatic shotgun that features a top mounted tubular magazine with a low-axis barrel (or tube-over-barrel) arrangement. This unorthodox structure has a significant advantage over traditional barrel-over-tube designs. Primarily because it places the barrel closer inline with the shooters shoulder. This more linear recoil path decreases muzzle climb and allowing for more efficient reduction of felt recoil. Combined with its solid weight, and well-designed operation the Model 12 is a pleasant to shoot, accurate workhorse for use by modern law enforcement and military personnel.
The Model 12 and its variants operate on a pair of self-regulating short stroke gas pistons that lay on either side of the barrel, the rods act on the bolt carrier of the rotating bolt, which engages the barrel extension by means of six locking lugs. Due to the low axis of the barrel, the bolt carrier itself rides along a thirty degree angled rail milled into the walls of the receiver. This action prevents the recoil force of the bolt from sliding directly rearwards into the shooters shoulder. Upon recoiling, the bolt carrier rides upwards and back along the rails, redirecting the recoil force upwards and back while cocking the internal hammer and clearing the trigger mechanism at the same time. Just as a muzzle break redirects the force of gasses upwards to counter the angular velocity of the barrel, the redirection of the bolts recoil force upwards and back works like a lever against the shotguns center of balance, taming muzzle climb significantly without need for specialized barrel porting.
At its apex the bolt carrier tips a wedge shaped cam, which forces a round from the magazine tube above the barrel in line with the chamber. The top edge of which maintains tension on the rest of the magazine tube to prevent double feeding and potential jams. Fired rounds are ejected downwards by means of a fixed stud action on the ejector rod, and upon reaching the tension point the recoil spring forces the bolt back down the rail towards the chamber. This action in turn picks up the round from the cam, forces the wedge back up (so that a new round may be pushed forward by the magazine spring for the next shot) where it once again locks against the barrel extension ready for the next shot. A bolt hold-open device is fitted on the magazine follower that prevents the feeding cam from rising upon the discharge of the last round. A spring-loaded port on the right side of the receiver allows direct loading of the tubular magazine by either a single or (with the assistance of a speed loader) multiple rounds at a time. The weapons charging handle can be attached to either the left or right side of the weapon and rides in a cut out in the extended fore stock. The charging handle engages a pusher plate that rides above the weapons operating-rods and does not reciprocate when firing.
The receiver on the Model 12 is milled aluminum though is overbuilt for the weapon. The original plans called for the receiver to support three and a half inch length or so called ‘Magnum’ shells for it original use as a hunting weapon. However as the design progressed and potential customers became more apparent, the specifications were rewritten for a more manageable load. The receiver, which had already been developed and properly tested was retained; both to save program costs, and due to its proven ruggedness. As such the sturdy receiver, though lighter than if it had been built of steel is still notably hefty in weight. The recoil dampening effects of the weapons weight however has not been ignored, and combined with the weapons other recoil taming features makes it a light recoiling, accurate weapon that is well liked by many professionals.
The sights on the Model 12 are a rugged pair of aperture/ghost-ring type, with tritium illuminated dots. The rear sight is protected by a pair of stamped steel wings, and is adjustable by means of an adjustment knob for windage located on the left side of the sight. The fore sight is fixed to the forward barrel ring making it integral to the barrel unit. Tritium lamps, a hallmark of Argus sights are installed in both front and rear sight units with contrasting amber rear, and green front lamps allowing for quick acquisition in low-light and ease of front sight focus in close quarters combat.A six inch section of M1913 specification rail is located forward of the rear sight along the top of the receiver to allow for mounting optical or electro-optical accessories as may be desired.
Fixed stock versions of the Model 12 are A1 and A2 models. The stock furniture is constructed of fiberglass-reinforced polymer, over-molded with pebble-textured rubber to provide an excellent grip and strength regardless of how wet or slippery an environment the operator is stationed in. The butt stock itself contains a hollowed out compartment designed to securely hold a take down tool, and a cable-style pull through cleaning kit. Both items are packed in a black nylon zipper case with pictorial field stripping instructions being silk-screened in white onto one side of the case. Individual items are secure inside the case by elastic straps to prevent any potential rattling they may produce while stored. This compartment is o-ring sealed to keep out moisture and closed by the attachment of the shotguns recoil pad. The recoil pad itself is formed from layers of rubber molded over a steel plate that acts as the primary support. The rear of the pad has a dovetail arrangement so as to attach securely to the butt stock, which is then locked in place by means of a metal locking button inset at the base of the stock. This allows for quick replacement of the butt stock if damaged, easy adjustment for length of pull, and quick access to the necessary cleaning and repair tools, and strong pad retention.
A third stock option on the Model 12 is a top-folding adjustable skelontized stock. Made of stamped aluminum, and attached to a similarly overmolded polymer pistol grip, the A3 style stock provides full length option in an easily concealed to stored form. The folding stock is fully adjustable for length up to one hundred and ten millimeters and is locked by a spring loaded catch that locks at ten millimeter intervals. This adjustment allows for those wearing body armor or those of different stature to comfortably shoulder and fire the weapon. In this configuration, the former storage compartment within the stock is lost, and a small compartment at the base of the pistol grip is only large enough to carry the take down tool. The folding stock locks in the folded position by means of a catch milled into the front of the top Rail Interface System (RIS) and is hollowed out to allow use of a suitably raised Optic in either the folded or open arraignment. When pistol grip is used without the folding stock it is officially referred to as a ' Model A4' though it retains the stock attachment point, many operators prefer to replace the stock pivot pin with a D-ring for attaching it to a single point sling system.
Both the magazine tube, and barrel are Melonite and QP Salt Bathed Nitrocarburized (SNC) cold forged steel. The low mounted barrel has a multi-bore profile that has the barrel taper by small margins three times gradually along its length for denser shot patterns without the use of a choke, while still maintaining excellent accuracy with factory non-rifled slug loads. The tubular magazine is slightly over bored and contains a series of internal rails to ‘float’ the rounds within the tube and prevent dirty shells or a dirty tube from jamming the weapon. These rails or ridges also act as lateral stiffeners to decrease the likelihood of dented or bent magazine tube from making the weapon a casualty of combat. The magazine follower is made of the same material as found in the Model 9 series pistol magazine follower, is highly visible in low light, extremely tough, and naturally lubricated. The magazine spring is triple braided stainless steel. Several small polycarbonate inserts are placed into several cutouts in the top of the magazine tube, allowing for instant indexing of current rounds available by the shooter without taking their eyes off the target.
A rugged, thoroughly modern workhorse of a weapon, the Argus Scattergun Model 12 designed like all Argus products to thrive in environments where other products fail. The combination of low axis barrel, gas operation, and bolt acting on an inclined plane makes the Model 12 pleasant to shoot, and easy to keep on target, making it a tack driver with slugs and carnage with buckshot. Capable of firing most of 12 gauge rounds the Model 12 is a versatile weapons when the operator enters a less than ideal position, and is forced to use his or her weapon.