SR-556 — specifications, caliber, stats, review, photos | WeaponAtlas
The SR-556 is a semi-automatic AR-15 pattern rifle in 5.56×45mm NATO / .223 Remington introduced in 2009. It uses a short-stroke gas-piston operating system and features a 16.1-inch barrel with detachable box-magazine feeding.
| Manufacturer | Sturm, Ruger & Co. |
|---|---|
| Year introduced | 2009 |
| Caliber | 5.56×45mm NATO, .223 Remington |
| Weight (unloaded) | 3.600 kg |
| Length | 832 mm |
| Barrel length | 409 mm |
| Magazine capacity | 30 rounds |