M110 SASS semi-automatic sniper system
M110 SASS semi-automatic sniper system
Caliber: 7.62 × 51mm NATO
XM110 SASS (Semi Automatic Sniper System, semi-automatic sniper system) is a semi-automatic rifle planned to replace the M24 SWS equipped by US Army snipers or team SAM shooters. It is an effective anti-personnel and anti-light equipment target and will allow Snipers provide increased firepower when performing support combat operations. The demand for this 7.62mm semi-automatic sniper system was proposed by the U.S. Army ARDEC and Picatinny Arsenal in the NJ 07806 bidding document. The basic requirement is to provide precision firepower to kill personnel targets at a range of 1,000 meters. The system must be portable by a single person. , shoulder-fired, compatible with all existing 7.62x51mm ammunition types in the Army, but the best effect can be achieved at long range when using M118LR, and M993 armor-piercing projectiles can also be used in specific mission requirements. After the rifle is zeroed, its accuracy is required to be equal to or better than the M24 SWS, and the accuracy of the first hit should be less than or equal to 1.0 MOA. Other requirements include:
Rapid fire, rapid reload and suppress sniper rifles
Exceeds the rate of fire and lethal effect of the M24 SWS
Lighter weight than M24 SWS
Antipersonnel range equal to or better than M24 SWS
Also improve the sniper's sighting system
Detachable folding bipod
Ammunition supplies are 5-round, 10-round and 20-round detachable magazines
Barrel life is greater than 5,000 rounds
Equipped with variable magnification white light sight (can deal with targets from 50 to 1000 meters)
Has removable muffler
Comes with hard transport/storage box
Integrated MIL-STD-1913 rail
Supporting maintenance tools
The U.S. Army found a total of 5 contractors to participate, and finally selected two solutions to enter the final competitive stage of comparative testing. Interestingly, the two remaining solutions were both improvements based on the AR-10 mechanism. The projects are KAC's SR-XM110 and Remington MPD/DPMS's AR-10T. The latter is an improved version of the Armalite AR-10 semi-automatic rifle equipped with a 20-inch medium match-grade barrel ( Armalite is also a 5 (one of the contractors, but was not shortlisted for the final stage), and KAC's SR-XM110 is an improvement from the Mk11 Mod0 sniper rifle system originally produced by KAC for the U.S. Navy SEALs.
On September 28, 2005, KAC's SR-XM110 won the competition and was officially designated as the M110 SASS.
The main components of the entire M110 SASS system include: 1 rifle, 4 20 - round magazines, 4 10 - round magazines, magazine bags, 600- meter backup iron sights, Harris bipods and rail-mounted Adapter, Leupold 3.5-10x40mm white light scope and matching scope accessories such as scope case, scope bag, scope cover and anti-reflective device, AN/PVS-14 night vision scope, leather strap, QD silencer, storage of the complete system and carrying case, as well as maintenance tools for weapons and optical sights. Rail interface is used to install the fire control system (optics, backup iron sights and laser designator).
The rifle is very similar to the Mk11 Mod0, with the main differences being the rail system, stock and muzzle device: the KAC free-floating RAS is used on the Mk11 Mod0, while the URX module rail system is used on the M110 SASS. The stock is an A2 fixed shape but the length is adjustable and can be shortened to the same length as the A1. In addition, the barrel of the M110 SASS also has a flash suppressor, and an improved QD suppressor can also be installed. In addition , after the M16 system is equipped with a silencer, the phenomenon of carbon deposits on the bolt and machine frame will be more serious. When shooting, the gunpowder gas will overflow from the gap in the charging handle and rush towards the shooter's eyes, interfering with the shooter's sight. Therefore, the M110 The charging handle with gas deflection function developed by KAC Company is also used so that the gas overflowing from the charging handle groove will not hit the shooter's face. But even so, carbon deposits on the bolt are inevitable, which will affect action reliability and shooting accuracy after firing several rounds in succession. Other campaign models have gas regulators to avoid this problem. There are some pretty interesting speculations as to why a defective gun was chosen. For example, some legends say that KAC holds a symposium with influential retired generals every year, and then offers earnest money, and then these retired generals influence the departments in charge of procurement and so on.
In addition to being flawed, the joint Remington /DPMS solution was said to be more accurate in testing, but it could not use the QD silencer already used in the Mk11 MOD0, and the KAC was cheaper, so it was not selected. Now Remington and DPMS have launched civilian models on the market. For example, DPMS has launched a civilian semi-automatic high-precision rifle named LRT-SASS . In fact, it is also using the prestige of this SASS competition to explore commercial value and put the bidding The money spent will be earned back from the civilian market.
Although it is slightly inferior to the Remington /DPMS sample gun in terms of accuracy and has the disadvantage of not being able to adjust the gas, since it can enter the finals, the performance of KAC 's XM110 is not much different. However, when the M110 wins the bid, does the US Army really intend to completely replace the manual M24 SWS with a semi-automatic sniper rifle ? On this issue, many people are skeptical or wait-and-see.
Many would rather believe that the M110 SASS is just another optional tool in the Army's sniper pistol arsenal, rather than a complete replacement for the already proven M24 . The M110 cannot replace the M24 in long-range shooting , and a manual rifle will be more reliable in harsh environments and require far less maintenance. In addition, there are also questions about whether semi-automatic sniper rifles are suitable for dedicated snipers. According to the use of Mk11 MOD by some US military snipers in Iraq , this weapon seems to be more suitable for use in urban warfare.
In fact, after several years of promoting the M110 equipment, the number of M110 equipment is indeed small, and its performance at medium and long distances is not good enough, so it cannot shake the status of the M24 . In fact, in early 2010, the US Army also ordered from Remington. A batch of new M24s have been purchased , and the M110 can now only be used as a supplement to the M24 , playing a role similar to the SAM-R. Although the Army's official statement was full of praise, and it even won an award for the best invention of the year, in fact, there were soldiers on the front line who complained a lot about the M110 and were very dissatisfied with this "back door" gun. In addition, it is said that the Delta Commandos and Green Berets believe that the M110 is not as good as the old SR-25 (should refer to the Mk11 MOD ), so the Army Special Forces still retains a large number of Mk11 MOD .
According to the available M110 factory acceptance standards, at a distance of 100 yards, an excellent shooter is shot in a sitting position with a support or a fixed frame, using M118LR sniper bullets, and according to the process specified in the document, 4 groups of 5 rounds are fired to measure the shooting accuracy. When shooting with a silencer, the aiming point must be kept constant throughout the accuracy test. The average MR of its four groups is ≤0.68 inches (1.7272cm), which is equivalent to the Chinese standard R50≤1.93cm for 20 rounds at 100 meters. The factory standard of M24 is equivalent to the Chinese standard of 20 rounds at 100 meters, R50 ≤ 1.71cm. It can be seen that the factory standard of M110 is not as high as M24.
Later, the army's top brass seemed to finally understand that it was really impossible for the M110 to replace the M24, and the M110's role in actual combat did not seem to need to be so long. Therefore, in 2012, the CSASS project was proposed to shorten the M110 and make it lighter. KAC Company The M110K1 was launched in response to this project . In 2016, the U.S. Army finally selected HK's G28 as the new M110A1 CSASS , replacing some of the roles of the M110 SASS.
flame arrester
Blank cartridge recoil assist device
The M110 can only fire semi-automatically
It is equipped with EAGLE magazine bag and can be connected to the combat carrier through the MOLLE system.
M110 with AN/PVS-10 installed
M110 SASS for tandem mounting of AN/PVS-29
M110 at SHOT SHOW 2008
The M110 exhibited at SHOT SHOW 2009 has an iPod Touch with an anti-collision case installed on the handguard. This PDA has ballistic calculator software installed in it.
SASS at SHOT SHOW 2010
M110 mounted on Hog Saddle sniper tripod
An M110 used by the Rangers during a public exercise on April 24, 2012.
Army Special Forces using the M110 during a sniper competition held by the U.S. Army Special Operations Command at Fort Bragg in December 2012.
The M110 that appeared at the international sniper competition held by the U.S. Army
Ranger using M110
M110 used by the U.S. Marine Corps during night drills
SEAL dog and M110
Afghan Army Special Forces using M110
Rangers using M110 in Afghanistan |
The M110 equipped by the Rangers with the Magpul PTR stock replaced Thai soldiers using M110s during the Cobra Gold 2014 joint exercise   The M110 used by Delta Commando snipers on helicopters is equipped with a low-magnification wide-field scope and a vertical front grip. It is obviously not used as a long-range sniper weapon.   |
Marines using the side red dot scope installed on the M110A1 for close range emergency shooting practice
Chris Kyle with M110 in Iraq
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