M110A1 rifle

M110A1 Compact Semi-Automatic Sniper System
The M110A1 Squad Designated Marksman Rifle
Type	Sniper rifle
Service history
In service	2016–present
Production history
Designed	2016
Manufacturer	Heckler & Koch
Variants	M110A1 CSASS M110A1 SDMR
Specifications
Mass	3.81 kg (8.40 lb) unloaded M110A1 CSASS 6.80 kg (14.99 lb) loaded M110A1 CSASS, scope, suppressor[1] 4.15 kg (9.15 lb) unloaded M110A1 SDMR 6.35 kg (14.00 lb) loaded M110A1 SDMR, scope, suppressor[2]
Length	899 mm (35.39 in) (M110A1 CSASS buttstock fully collapsed) 1,009 mm (39.72 in) (M110A1 CSASS buttstock fully extended) 1,019 mm (40.12 in) (M110A1 SDMR with suppressor)[2]
Barrel length	414 mm (16.30 in)[2]
Cartridge	7.62×51mm NATO
Action	Gas-operated, rotating bolt
Rate of fire	Semi-automatic
Muzzle velocity	750 m/s (2,461 ft/s) with 175 gr. M118LR[citation needed]
Effective firing range	800 metres (875 yd) (point targets)
Feed system	10 or 20-round detachable box magazine

M110A1 may refer to the M110A1 CSASS (Compact Semi Automatic Sniper System) or the M110A1 SDMR (Squad Designated Marksman Rifle). It is an American semi-automatic sniper rifle that is chambered for the 7.62×51mm NATO round. It is manufactured by Heckler & Koch (H&K) and developed from the company's HK417, and similar to the Bundeswehr G28 configuration. Despite a designation similar to the M110 Semi-Automatic Sniper System (M110 SASS), the M110A1 is an unrelated design as the former was a development of the Knight's Armament Company SR-25. The M110A1 CSASS was expected to supplant and eventually replace the M110 in U.S. military service but this does not appear to have occurred as of 2022. However, several thousand M110A1 SDMRs have been fielded with the US Army and Air Force to replace various weapon systems currently being used.