The Steyr ACR was a 1990s bullpup rifle developed for a US military program, notable for its polymer construction and unique flechette ammunition. Firing needle-like projectiles at an extreme 4,800 fps, it featured an open-bolt action and a distinctive ring primer for reliable ignition. While innovative, it represented a departure from conventional firearm design.
The Steyr ACR was a 1990s bullpup rifle developed for the US military's Advanced Combat Rifle program, aiming to improve hit probability. It uniquely fired lightweight flechette projectiles at 4800 fps, offering a flat trajectory and low recoil. Despite innovative features like a polymer case and a vertically sliding chamber, the program was canceled as no contender met the stringent hit probability improvement goals.
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