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 su
Steyr Advanced Combat Rifle entry
Rifles tested in ACR program, Steyr ACR third counting from top
The Special Purpose Individual Weapon was a long-running United States Army program to develop, in part, a flechette-firing "rifle", though other concepts were also involved. The concepts continued to
Steyr ACR
…Scicon IW Special Purpose Individual Weapon Steyr AMR 5075/Steyr IWS 2000, a prototype long range sniper rifle which fires similar but larger rounds…
The Special Purpose Individual Weapon at the museum of the Aberdeen Proving Ground in Aberdeen, Maryland, United States