For other items known as M21, see: M21 Disambiguation
Overview [ ]
Rifle, Sniper, 7.62mm, M21
Developed From
Rifle, Sniper, 7.62mm, XM21
Developed Into
Rifle, Sniper, 7.62mm, XM25
Expected Muzzle Velocity
853m/s
Action
Gas-operated, rotating bolt
Feed System
Detachable box magazine
Ammunition Loading
M14 compatible magazines:
• 10-rnd
• 20-rnd
• 30-rnd
•
X-14 50-rnd
Weight
5.27kg (without optic)
Chassis
Epoxy impregnated walnut chassis
Rifling
4 grooves, 305mm right hand twist
Sights
Iron sights: • Front post • Rear hooded aperture Optional telescopic sight
The Rifle, Sniper, 7.62mm, M21 (abbreviated as M21 Sniper Rifle ), also known as M21 Sniper Weapon System (abbreviated as M21 SWS ) is a sniper rifle developed in the late 1960s.
The M21 is the standardized XM21 , which was developed from the M14 National Match .
Variants [ ]
Rifle, Sniper, 7.62mm, XM21 «Sniper Weapon System»
Prototype model developed from M14 (NM) .
Rifle, Sniper, 7.62mm, M21 «Sniper Weapon System»
Standard model.
Derivatives
Rifle, Sniper, 7.62mm, XM25 «Sniper Weapon System»
Product improvement prototype from the 1980s.
Rifle, Sniper, 7.62mm, M25 «Sniper Weapon System»
Product improvement standard model from the 1980s.
Infantry Weapons
Melee Weapons
Knives
Ka-Bar • M7 • M9 • M11 • OKC-3S
Sidearms
Pistols
Gyrojet • M9 (A1 • A2 • A3 • A4 ) • MK 22 MOD 0 • XM11
Machine Pistols
M10 • M11 • MP9
Close Quarters
Personal Defense Weapons
IO MP2
Submachine Guns
Colt RO635
Shotguns (automatic)
Atchisson Assault Shotgun
Shotguns (semi-automatic)
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Shotguns (manual-action)
Mossberg 500 (A ) • Mossberg 590 • Remington 870 (Express • Magnum • TA Trap • TB Trap • TC Trap )
Primary Weapons
Assault Rifles
Colt 601 • Colt 602 • M16 (A1 • A2 • A3 • A4 ) • M17S • Stoner 63 (A ) • XM22 (E1 )
Assault Carbines
XM177 (E1 • E2 )
Battle Rifles
AR-10 (A • A2 • A2C • A4 • A4C • B ) • M14 (E1 • E2 )
Battle Carbines
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Civilian Rifles
SIG AMT
Automatic Support Weapons
Light Machine Guns
M15 • Stoner 86
General Purpose Machine Guns
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Heavy Machine Guns
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Long Range
Anti-Materiel Rifles
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Bolt-Action Rifles
M24 (A1 • A2 • A3 • E1 ) • M40 (A1 • A3 • A5 • A6 • A7 ) • Remington 700
Designated Marksman Rifles
M21 SWS
Launchers
Grenade Launchers (Attachment)
40mm M203 (A1 • A2 )
Grenade Launchers (Standalone)
40mm China Lake • 40mm EX 41 • 40mm M32 • 40mm M79 • 40mm T148E1
Disposable Rocket Launcher
83.5mm M141 • 84mm M136 • 139.7mm FGM-172
Rocket Launchers
66mm M72 (A1 • A2 • A3 ) • 66mm M202 (A1 ) • 84mm M3 MAAWS
Underwater Weapons
Assault Rifles
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Explosives
Anti-Personnel Mines
M18 (A1 ) • MM-1
Anti-Tank Mines
M15 • M19 • M21
Offensive Grenades
AN/M14 Thermite • M7A3 CS Gas • M25A2 Riot Control • M47 Riot Control • M67 Frag • M84 Stun
Smoke Grenades
AN/M8 • AN/M18 • AN/M83 White Smoke Grenade
Firearm Accessories
Weapon Sights
Collimator
Crossfire • Razor • RX30 • Razor AMG UH-1 • SPARC AR • SPARC II • Spitfire 3x • Spitfire AR • Strikefire II • Venom • Viper
Holographic
EOTech 553
Iron
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Night
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Reflector
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Telescopic
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Attachments
Flashlights & Lasers
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Foregrips & Bipods
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Infantry Equipment
Camouflage
Camouflage
ERDL • OD • MARPAT • UCP • Woodland
Clothing
Backpacks
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Body Armour
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Bomb Suit
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Elbow and knee pads
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Signals & IFF
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Suits
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Vests & Webbing
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Headwear
Communication
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Gas Masks & Rebreathers
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Goggles
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Helmets
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Vehicle Headwear
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Optics, Detection and Surveillance
Man-Portable Radar
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Mine Detectors
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Night Vision Goggles
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Periscopes
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Rangefinders
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Surveillance
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Artillery
Anti-Aircraft Guns
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Anti-Tank Guns
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Field Guns
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Howitzers
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Infantry & Mountain Guns
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Mortars
81mm M252 • 107mm M30 • 120mm M121
Railroad Artillery
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Recoilless Guns
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Rocket Artillery
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Siege Artillery
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Land Vehicle Weapons
Machine Guns
5.56mm
M231 FPW
7.62mm
FN MAG • GAU-19 • M37 • M60 • M73 • M219 • M240 • M1919A4
12.7mm
GAU-19 (A • B ) • M2 • T175 (E1 ) • XM238
Tank Guns
76.2mm
M32 • T91 (E1 • E2 • E3 ) • T185 (E1 )
90mm
M3 • M41 • M54 • T7 • T15E2 • T54 • T76 • T125 • T208 (E9 • E13 ) • T209
105mm
M68 (A1 • E1 ) • QF20 Pdr • T5E1 • T5E2 • T140 (E3 • E4 ) • T147 • T254 (E2 ) • X15E8 • XM35
120mm
M58 • M256 • T53 • T122 • T123E1 • T123E6 • T179 • Rheinmetall • X23
152mm
M81 (E1 ) • XM81 (E6 ) • XM150 (E5 • E6 )
155mm
T7 (E1 ) • T180
165mm
M57 • T156
175mm
M113 • T256E3
203.2mm
M1
Howitzers
105mm
M2 (A2 ) • M4 • M49 • T96E1 • M103 • XM104 • XM103
155mm
M45 • M126 (A1 ) • M185 • T186E1 • M284
203.2mm
M1 • M2 (A1 • A2 ) • M201A1
240mm
240mm M1
Autocannons
20mm
M168 • Rh 202
25mm
M242 • Oerlikon KBA
30mm
Bushmaster III
40mm
M2 (A1 )
75mm
75mm XM274
Recoilless Guns
106mm
M40 (A1 )
Misc.
Spotting Rifles
M8
Aircraft Weapons & Munitions
12.7mm Aircraft Machine Guns
Browning M2 (AN/M2 • AN/M3 ) • GAU-19
Aircraft Cannons below & including 30mm
20mm AN/M2 • 20mm AN/M3 • 20mm M24 • 20mm FMC T-160
Aircraft Cannons above 30mm
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