An AR-15-style rifle is any lightweight semi-automatic rifle based on or similar to the Colt AR-15 design. The original ArmaLite AR-15, its predecessor, was a scaled-down derivative of Eugene Stoner's ArmaLite AR-10 design and featured selective fire. Tech Zoo #rifle #machine #design #technology #mechanism | Tech Zoo

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5 fatally shot by suspect armed with AR-15 in Texas

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