SG 550 — specifications, caliber, stats, review, photos | WeaponAtlas
SG 550 is a Swiss 5.56×45 mm NATO assault rifle introduced in 1990. It uses a gas-operated action with a rotating bolt, a folding polymer stock, and detachable box magazines.
| Manufacturer | SIG Sauer |
|---|---|
| Year introduced | 1990 |
| Caliber | 5.56×45mm NATO |
| Weight (unloaded) | 4.100 kg |
| Length | 998 mm |
| Barrel length | 528 mm |
| Magazine capacity | 20 rounds |
| Rate of fire | 700 rpm |
| Muzzle velocity | 911 m/s |
| Effective range | 100 m |