No 7. M21 (American)
| Type | Sniper rifle |
|---|---|
| Place of origin |  United States |
| Service history | |
| In service | 1969–1988 |
| Used by | United States |
| Production history | |
| Designer | Army Weapons Command, Combat Development Command, Limited Warfare Agency |
| Designed | 1969 |
| Manufacturer | Rock Island Arsenal, Springfield Armory |
| Variants | M25 |
| Specifications | |
| Weight | 5.27 kg (11.6 lb) |
| Length | 1118 mm (44 in) |
| Barrel length | 560 mm (22 in) |
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| Cartridge | 7.62x51mm NATO |
| Action | Gas-operated, rotating bolt |
| Muzzle velocity | 853 m/s (2,800 ft/s) |
| Effective range | 690 m (750 yd) |
| Feed system | 5, 10 or 20-round detachable boxmagazine |
| Sights | Front: National Match front blade .062 Rear: Match-grade hooded aperture with one-half minute adjustments for both windage and elevation. 26 3/4 in sight radius. |
