Special purpose rifle Mk12 MOD1 belongs to the family weapons AR-15 / M16. It was originally developed for U. 5 units. SOCOM (Special Operations Command). The self-loading rifle, which uses a scheme with the removal of powder gases, is used by the US Marine Corps in Afghanistan to hit targets at ranges up to 800 m.
In Iraq and Afghanistan, the rebels are leading a guerrilla war against local security forces and coalition troops. Rebel tactics - surprise ambush attacks. However, they often make only a few shots from long ranges and then depart. Rebels often use civilians as human shields. This behavior makes it almost impossible for the security forces to respond with fire, as there is a threat to the civilian population and this causes collateral losses.
The assault rifles used in the coalition troops, such as the Bundeswehr G36A2, the British SA80A2, the British armed forces and the M16A4, and the M4A1 US armed rifles simply do not have enough accuracy to defeat them to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to defeat them, to beat them. In response to this state of affairs, coalition forces began to acquire the so-called "rifles for selected apt shooters." They were then accepted for use by troops participating in operations in Iraq and Afghanistan, at the level of a detachment or platoon and were given the best shooters, which thus became the "selected marksmen". “Selected marksmen” are not snipers, they are those who, thanks to the best weapons, are able to confidently hit targets that their comrades cannot hit.
In 2009, the United States Army adopted an improved rifle, the M14, chambered for the 7,62x51, as a rifle for "selected apt shooters." Recently, the British army began to issue At the branch level sniper rifle L129A1 chambered for 7,62x51. In the Bundeswehr in the framework of the coverage of "immediate needs related to the conditions of hostilities" several G3 assault rifles chambered for 7,62x51 cartridge were converted into "rifles for selected apt shooters". The US Marine Corps already in 2003, took a special-purpose rifle Mk2 MODI chambered for 5,56x45 as a weapon for apt shooters.
Designed for special forces
The special-purpose rifle Mk12 MOD, like its predecessor, the special-purpose rifle Mk12 MOD0 belongs to the AR-15 / M16 weapon family. It is an automatic weapon caliber 5,56x45, using the principle of removal of powder gases. Originally, rifles were designed to meet the needs of the Navy and Special Forces units of the US Army in a new self-loading sniper and high-precision rifle. History The development of this weapon can be tracked, starting with the Special Operations Peculiar Modification Kit program developed in 1990-ies (SOPMOD, abbreviated as “Modification for the Special Operations Forces”). The SOPMOD kits consisted of sets of units for retrofitting the M4А1 carbine, with the installation of which the weapon, previously used only by special units, could be adapted for special conditions of use. When using retrofit elements, the possibilities of aiming and identifying the target are improved, the reaction time is reduced and the accuracy of shooting is improved both in the near zone and when using weapons at ranges to 600 m day and night.
The first SOPMOD kits were issued to the troops in 1995 and included the following components: ACOG-x4 sight, laser AN / PEQ-2A laser / light module, mounted 40 mm M203 grenade launcher, silencer, night sight AN / PVS-17A, tsevё s four Pikatini strips according to the military standard MIL-STD-1913.
As part of the development of the SOPMOD kit program in the Crane division of the Land Forward Operations Center of the US Navy, they also thought about installing the MXXUMX4 carbine into a sniper rifle by installing retrofit units. In the future, an independent project grew out of these plans, which led to the creation of special-purpose rifles Mk1 MOD21 and Mk0 MOD12. At the beginning of the 1, the first Mk2003 MOD12 SPR rifles entered the units of the US Special Operations Command (SOCOM). In November of the same year, the Mk1 MOD12 SPR rifles were issued to units of the US Marine Corps that participated in operations in Iraq and Afghanistan.
The weapons for the US Marine Corps are produced by the High-Precision Weapons Section of the training battalion located at the Marine Corps Base in Kwaitico, Virginia. In order to achieve the highest possible accuracy and to keep manufacturing tolerances as low as possible, components from only certified manufacturers are used to manufacture weapons.
The special-purpose rifle Mc12 MOD1 caliber 5,56x45 in unloaded form, as a silencer, as well as with a Leupold Mk4 rifle scope 2,5-8X36 weighs 5,5 kg, is 184 mm in height and 82 mm in width. The length of the weapon without a silencer is 946 mm, with a silencer 1067 mm. The theoretical rate of fire without a muffler ranges from 625 to 650 shots / min; with a silencer, it rises to 775-800 shots / min. Although from the 12 MOD1 you can also fire in short bursts and continuous firing, it should be mentioned that it was not intended for this.
For the production of the first Mk12 MOD1 trigger boxes, the boxes from М16А1 were used, and the Mk12 MOD1 of later production was based on the М4А1 design. They are equipped with two-stage match trigger mechanisms. With warning and descent force 2 kg. production company Knight's Armament. In addition, the trigger is equipped with a new trigger. In addition to the “Protection” position, the safety lever can also select firing modes - “Single” (single designation) and “Continuous” (designation Auto; on some frames, instead of Auto, marked Burst). The shop window is unmodified, and for the Mk12 MOD1, the same 20 or 30 charging stores are used as for the M16L4 or M4D1. The frame and shoulder rest are used the same as for М16А4.
At the compound level in the Marine Corps, the individual Mk12 MOD1 are completed with a Magpul-type retractable shoulder stop MY Stock - Mil-Spec, manufactured by Magpul Industries Corporation. The shoulder rest has a rubberized butt and the adjustment range 83 mm (four installation steps).
Receiver and receiver pad
"Multiplication table" for the shooter: using the Mildot-Master counting ruler, you can calculate the firing range and decrease the trajectory
As for the receiver, bolt carrier and butterfly valve, here we are talking about the standard components of the rifle M16A4. but still, parts with particularly small manufacturing tolerances are used, which are subjected to additional testing by increased pressure and are finally checked for the presence of cracks on the magnetic flaw detector. On top of the receiver is the Picatini plate according to the military standard MIL-STD-1913. By replacing the conventional cocking handle with a DPMS Firearms, LLC, the PRI M84 Gas Buster Charging Handle has improved weapon safety. The new cocking handle has an ergonomically improved locking lever with a larger surface for fingers. In addition, this cocking handle better than the previous closes the receiver and prevents the gunner from flowing gunpowder gases and oil particles from getting into the face of the shooter. A construction called the Rail Adapter System Free-Floating Barrel (Long) Model 21318 (long adapter with guide bars; freely oscillating barrel), which is actually the forend, is manufactured by Knight's Armament and has four Pickatini strips of military standard MIL-STD -1913 length 286 mm each. Along with other components, a front sling is installed on the slat under the belt for wearing.
Front: The folding fly from Knighfs Armament is located at the front end located on top of the Pictini bar's forearm.
Behind: The folding sight of the Mk12 MOD1 SPR rifle, also produced by Knighfs Armament, is a mechanical sight.
Reducing: when firing without a silencer, a reduction in recoil and tossing the muzzle provides a compensator
Dimensions: with a Leupotd telescopic sight and a silencer, the McNNXX MODI SPR rifle is 12 mm long, 1067 mm high and 184 mm wide
The Mk12 MOD1 rifle has a long, free-swinging barrel with six right-handed grooves; rifling pitch - 7 inches (178 mm). Barrel length is 472,5 mm (18,6 in). The special shape of the barrel improves heat dissipation and firing accuracy while reducing weight. The barrels for the Mk12 MOD1 are manufactured by three different companies: Douglas Barrels Incorporated, Lewis Machine & Tool Company and Barrel Barn. The gases are evacuated with the help of a gas block installed on the barrel, which is produced by the Crane unit of the US Naval Warfare Center on land.
The Mk12 MOD1 SPR rifle uses a Leupold Mk4 2,5-8x36 MR / T М2 rifle scope with Tactical Milling aiming mark. The aiming mark can be highlighted. The stable, waterproof sight weighs 454 g and has a length of 287 mm. The sight is optimized for use in twilight, and allows the shooter to clearly distinguish between contours and targets, even in low light. To eliminate glare, the sight has flip-up lens and eyepiece covers. The vertical and horizontal adjustment range is 90 angular minutes. Adjustment is carried out by "clicks"; The price of a “click” is 1 / 4 angular minutes. The sight is mounted on the Picatini rail of the receiver with the help of mounting rings from Atlantic Research Marketing Systems Incorporated. In case the telescopic sight is damaged, the Mk12 MOD1 SPR also has a mechanical sight, which consists of a folding diopter pillar and a folding front sight, also produced by Knight's Armament. According to the Service Manual, mechanical
the sight is designed to use weapons in the range from 200 to 600 m. Adjustment screws on the rear sight allow you to adjust horizontally and vertically. The rear sight, like an optical sight, is mounted on the Pikatini bar of the receiver, the front sight is in front, on the Picatini bar of the forearm. Pikatini slats on the forearm of the Mk12 MOD1 SPR rifle allow you to additionally install various sighting devices or night vision attachments, for example, the AN / PI-Q-2A Aiming Light laser target designator or the AN / PEQ 16A Laser Integrated Light Integrated Pointer Illuminator Module (M1PX) ) - “Integrated minimodule of target indication and illumination”.
Muffler and fry
The Mk12 MOD1 SPR rifle is supplied with the silencer of the 12 model SPR'iVIBS 5,56 mm Precision Suppressor. This silencer is manufactured by OPS Incorporated. He simply screwed onto the compensator located on the muzzle of the rifle; cuff, advancing on the trunk, is used for centering. When firing without a silencer, the compensator provides a reduction in recoil and toss the muzzle. Due to the removal of powder gases to the sides and upwards, it also prevents the formation of clouds of dust when firing. The hole in the muzzle of the compensator is 0,762 mm larger than the bullet diameter. The silencer has a length of 216 mm and diameter of 38 mm. It is made of explosion-welded 300 alloy steel. According to the manufacturer, the muting efficiency of the sound is 40 dB.
Bipod rifle Mk12 MOD1 SPR is a model HBRM-S company Harris Engineering. Its supports can be extended from 153 to 228 mm with 25 mm pitch. The hinge integrated into the base of the bipod, the rotational force of which can be adjusted, allows the shooter to eliminate stall rifle on an uneven surface. Installation of the bipod is carried out by Knight’s Armament’s mounting plate on the lower bar of Pikatini forearm.
Special purpose rifle Mk12 MOD1 SPR is supplied in a waterproof and dustproof, impact-resistant Pelican-1700 weapon case. It is made of black, exceptionally impact polypropylene copolymer. The case weighs 7,7 kg, has a length of 968 mm, a width of 406 mm and a height of 155 mm; the internal dimensions are 908 mm in length, 343 mm in width and 133 mm in height.
A rifle cleaning accessory is supplied by Otis Technology Incorporated; It is in a convenient nylon bag with a zip. Along with the other components, the cleaning kit includes a Memory-Flex cleaning cord, a rag holder and various barrel cleaning brushes. In addition, for intensive cleaning, a nylon-coated ramrod and ramrod guide are supplied with a rifle.
The documents that are delivered to the troops along with the rifle include the “Mk5,56 MOD12 TM1A-OR-l Special Purpose 11416-mm Rifle Manual”, which describes the maintenance and handling of the rifle in detail. It is attached both in print and in electronic form, on CD-ROM in pdf format. The form documents the accuracy of shooting.
Attached to the scope of the operation and maintenance manual, as well as a description of the aiming brand Tactical Milling. The Mildot Master calculating line is very useful, with the help of which, using data obtained from the aiming mark. you can quickly and easily determine the distance to the target and lowering the bullet relative to the throwing line. Equally useful is the table with ballistic data.
In fact: Marines 1-th lightly armored reconnaissance battalion
With a special-purpose rifle, the Mk12 MOD1 can be fired with all 5,56x45 caliber cartridges, which are accepted by the US military. Especially for use with this rifle, cartridges are issued with a special 77-faceted (5 g) long-range bullet Mk262 MOD0 / MOD1 АА53 (77 gr Long Range Special Ball Mk262 MOD0 / MOD1 AA53). These cartridges use an 77 facet bullet with a cavity in the head and a tapered shank (NRT). In the production of Mk262 MOD0 cartridges, Sierra Matchking bullets from the Black Hills Ammunition are used. The McNXX MOD 262 cartridges use Sierra Matchking bullets from both Nosier Incorporated and Black Hills Ammunition. The National Defense Industry Association (NDIA) declares the accuracy of these rounds at a level less than 1 angular minutes. When firing these cartridges from an assault rifle M1A16 or a carbine M4A4 reach accuracy in 1 angular minutes; standard infantry cartridges of the US Army M2 achieve accuracy only from 855 to 3 angular minutes. According to the Service Guide, when using Mk5 MOD262 / MOD0 АА1 rounds, the Mk53 MOD12 SPR rifle can confidently hit head targets to the 1 distance and height targets - to the 600 m. of their Mk800 MOD12 SPR rifles in Afghanistan are stably neutralizing targets at ranges over 1 m.
|Complete set of rifle special-purpose Mk12 MOD1|
|Manufacturer||Delivery Numbers||Special rifle|
|Mk12 MOD1 SPR in kits accessory||Precision Weapon Section, Weapon Training Battallion||NSN 1005-01-504-3276|
|Optical ScopeLeupold Mk4 2,5-8x36 MR, T M2||Leupold||NSN 1005-01-562-0953|
|Rifle Mount Rings||Atlantic Research Marketing Systems Incorporated||NSN 5365-01-562-0979|
|Trunk||Douglas Barrels Incorporated, or Lewis Machine & Tool Company Incorporated, or Barrel Barn||NSN 1005-01-562-0794|
|Bipolar HBRM-S||Harris engineering||NSN 1005-01-562-0842|
|Cocking handle PRI M84 (Gas Buster Charging Handle)||DPMS Firearms LLC||NSN 1005-01-562-0842|
|Handguard with Picatini strips according to MIL-STD-1913 standard||Kniqht's Armament||NSN 1005-01-562-0913|
|Front sling for seat belt||Knight's armament||NSN 1005-01-562-0843|
|Base of the bipod||Kniqht's Armament||NSN 1005-01-486-0350|
|Trigger with warning||Knight's armament||NSN 1005-01-562-0901|
|Dioptric Target (folding)||Kniqht's Armament||NSN 1005-01-499-6868|
|Fly (folding)||Kniqht's Armament||NSN 1005-01-473-1410|
|Vapor Block||Crane Division US Naval Surface Warfare Center||NSN 1005-01-562-0791|
|Muffler 12-I model SPR MBS 5,56 mm (Precision Suppressor)||OPS Incorporated||NSN 1005-01-504-3277|
|Compensator||OPS Incorporated||NSN 1005-01-562-0932|
|Gun case||Pelican 1700 Pelican Products Incorporated||NSN 6760-01-491-2827|