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| Steyr ACR | |
|---|---|
 Steyr Advanced Combat Rifle entry | |
| Type | Bullpup assault rifle/Flechette rifle |
| Place of origin | Austria |
| Service history | |
| Used by | United States (experimental) |
| Production history | |
| Designer | Ulrich Zedrosser |
| Designed | 1987 |
| Manufacturer | Steyr Mannlicher |
| Specifications | |
| Mass | 7.12 lb (3.2 kg) (unloaded) |
| Length | 30.7 in (780 mm) |
| Barrel length | 21.3 in (540 mm) |
| Cartridge | 5.56×45mm annular-primed SCF (synthetic case flechette) |
| Caliber | 5.56mm (Sabot Diameter) |
| Action | Gas-operated, vertically sliding chamber |
| Rate of fire | Semi automatic 3-round burst at 1200rpm cyclic rounds per minute[1] |
| Muzzle velocity | 4,757 ft/s (1,450 m/s) |
| Feed system | 24-round detachable box magazine |
| Sights | Optical |
The Steyr ACR was a prototype flechette-firing assault rifle built for the US Army's Advanced Combat Rifle program of 1989/90. Although the Steyr design proved effective, as did most of the weapons submitted, the entire ACR program ended with none of the entrants achieving performance 100% better than the M16A2, the baseline for a successful ACR weapon.
- ^ "Advanced Combat Rifle by Department of Defense". The Internet Archive. 26 February 1991. Retrieved May 11, 2018.