| M110 Semi-Automatic Sniper System | |
| Origin: | United States |
| Type: | Sniper rifle |
| Is Ranged: | yes |
| Service: | 2008–present |
| Wars: | War in Afghanistan Iraq War Kurdish–Turkish conflict (2015–present) Militias-Comando Vermelho conflict Syrian Civil War War in Iraq (2013–2017) |
| Design Date: | 2007 |
| Manufacturer: | Knight's Armament Company |
| Variants: |
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| Weight: |
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| Length: |
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| Part Length: | 508mm barrel |
| Cartridge: | |
| Action: | Gas-operated, rotating bolt |
| Rate: | Semi-automatic |
| Velocity: | 783m/s with 175 gr. M118LR |
| Range: | 800m (2,600feet) (point targets) |
| Feed: | 10 or 20-round detachable SR-25 pattern box magazine |
The M110 Semi Automatic Sniper System (M110 SASS) is an American semi-automatic sniper rifle that is chambered for the 7.62×51mm NATO round. It is manufactured by Knight's Armament Company, developed from the Knight's Armament Company SR-25, and adopted by the U.S. military following the 2005 US Army Semi-Automatic Sniper Rifle (XM110 SASR) competition.
The M110 is to be replaced by the lighter and more compact M110A1 CSASS, which is developed from the G28, a variant of the Heckler & Koch HK417, however, most M110A1 models fielded have been of the SDMR variant. In 2021, a newer variant, the M110A2, was showcased and seen in use in early 2022.
The M110 Semi-Automatic Sniper System is intended to replace the M24 Sniper Weapon System used by snipers, spotters, designated marksmen, or squad advanced marksmen in the United States Army. However, the U.S. Army still acquired M24s from Remington until February 2010.On September 28, 2005, the Knight's Armament Co. rifle won the competition and was selected to be the supplier of the M110 Semi-Automatic Sniper System.
The XM110 underwent final operational testing in May and June of 2007 at Fort Drum, New York by a mix of Special Forces troops and Sniper trained soldiers from the 10th Mountain Division. In April 2008, U.S. Army soldiers from Task Force Fury in Afghanistan were the first in a combat zone to receive the M110. The troops rated the weapon very highly, noting the quality of the weapon and its semi-automatic capabilities compared to the bolt-action M24. The United States Marine Corps will also be adopting the M110 to replace some M39 and all Mk 11 as a complement to the M40A5.
The rifle has ambidextrous features such as a double-sided magazine release, safety selector switch, and bolt catch.
The rifle is similar to the SR-25/Mk 11 Mod 0, but differs significantly in buttstock and rail system design. The SR-25, Mk 11 Mod 0, and M110 are based loosely on the original AR-10 developed by Eugene Stoner but feature additional refinements instituted by KAC to maximize parts commonality with the AR-15 design, improve weapon reliability, and increase accuracy.
The main differences between the Mk 11 and M110 are improvements suggested by a user group meeting between NAVSPECWAR, USASOC and USA in 2007:
On June 12, 2008, the M110 was ranked #2 on the U.S. Army's top ten inventions of 2007.According to performance specification (MIL-PRF-32316 (AR) w/AMENDMENT 1, 5 October 2009):
3.4.1.1.1 Accuracy. The distance between the mean point of impact of each shot group, both unsuppressed and suppressed, shall be not greater than 1.1 inches at 300 feet.
3.4.1.1.2 Dispersion. The average mean radius (AMR) (see 6.11), of each shot group shall be not greater than to 0.68 inches at 300 feet. All targets shall be fired on using M118LR ammunition or equivalent, using five (5) round groups.
In 2009, the M110 rifle and commercial equivalents were added to the list of NRA-legal US service rifles under rule 3.1.6 of the NRA High Power Rifle Rules.
In April 2011, according to Military.com, the U.S. Army issued a request to the private sector to reconfigure or replace the current Knight Armament M110 sniper rifle, alleging that the current version of the M110 was not functioning well in the field and, according to industry officials and users in the field, required significant maintenance and replacement of parts. The U.S. Army responded directly, claiming that the rifle was functioning perfectly, citing a 100% approval rating from the 173rd Airborne Brigade, and they were simply looking for a smaller, lighter version of M110 for the spotter in a sniper team.
The specifications the U.S. Army has issued are as follows:
See main article: M110A1 Rifle. In July 2012, the U.S. Army requested sources to remanufacture the current M110 rifle into the Compact Semi-Automatic Sniper System (CSASS). The CSASS will be a shorter and lighter version of the M110 with a collapsible stock and removable flash suppressor, giving it an overall length of 36inches and a weight of 9lb unloaded. The Army wants a capability to convert 125 rifles per month, with the ability to increase to 325 per month. The Army formally requested proposals for the CSASS in June 2014.
On 1 April 2016, the Army announced it had awarded Heckler and Koch a contract with a maximum value of $44.5 million as winner of the competition to replace the KAC M110. The weapon selected was not specified, but was likely the H&K G28; H&K is to produce 3,643 rifles. A goal of the effort was to give snipers a weapon that didn't "stick out" as a sniper rifle; with a suppressor, the M110 is 46.5inches, 13inches longer than the M4 carbine and 7inches longer than the M16A4 rifle. A minimum of 30 CSASS units will be used for production qualification testing and operational testing over 24 months.
H&K later confirmed that a modified G28 had indeed been selected as the CSASS rifle. The G28 is nearly 6 cm (2.5 in) shorter and 1.3 kg (3 lb) lighter than the M110 (unloaded and without a suppressor) and will cost about $12,000 per rifle. The U.S. Marine Corps was slated to begin receiving the CSASS in May 2018 to replace their M110 rifles. However, as of 2022, all of the M110A1 units delivered were configured as squad designated marksman rifles (SDMR) rather than M110A1 CSASS rifles.
The M110A2 is an improved version of the original M110 rifle with M-LOK rails, an improved gas system, new suppressor, and adjustable stock. This fills the gap of semi-automatic sniper rifles as most all of the M110A1 rifles issued were the SDMR variant and not designed for sniper work. The M110A2 was first seen at AUSA 2021 where it was displayed alongside a 14.5" SOCOM M110 rechambered for 6.5 Creedmoor. The M110A2 was later seen at the 2022 Best Ranger Competition being used by a Ranger-qualified 101st Airborne Division soldier.
The M110A2 is shorter than the original M110 and lighter as well at 10.5lb, which is comparable to the M110A1 SDMR's weight of 10.9lb with no attachments save an unloaded magazine. The decreased overall length does not come at the cost of barrel length as the M110A2 still has a 20inches barrel. KAC had a 5 year $13 million contract in 2020 to supply the Army with M110 rifles and this was amended in 2022 to include the M110A2 version of the rifle.
The Navy and Marine Corps, which had previously been interested in the M110A1 CSASS, decided to instead pursue an M110 SASS PIP (Product Improvement Program) for FY2021 based on findings indicating improved range and lethality with the PIP compared to the M110A1 CSASS. Funding for subsequent fiscal years has been devoted to this PIP.
The M110A3 is a 6.5mm Creedmoor conversion for SOCOM M110 rifles. In October 2019, NSWC Crane ordered KAC's self-termed M110K1 conversion kits to upgrade USSOCOM's M110s to fire 6.5mm Creedmoor, with 14.5inches and 22inches barreled configurations.
These conversion kits included complete upper receiver assemblies chambered for 6.5 Creedmoor as well as new muzzle brakes, and B5 Systems collapsible precision buttstocks. New QD suppressors for 6.5 Creedmoor were to be ordered separately.
Armenia: Used by Army Special Forces.
Bahamas
Belize
Benin
Brazil: Used by Army Special Forces[1]
Bhutan
Cameroon
Chad
Czech Republic
Georgia: Used by GSOF.[2]
Hungary
Iraq
Kenya
Latvia
Mexico
Peru
Poland: Used by Polish Special Forces.
Romania[4]
Senegal[4]
Singapore
Slovakia[4]
Tunisia[4]
Turkey[4]
Ukraine: Reported to be used by special forces units under GUR, SBU, SSO and Ukrainian National Guard control.[5] Foreign soldiers in the International Legion have used them in combat missions.[5]
United States: Used by both US Army and Marine snipers.