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

What Is An AR-15? History Of The Semi-Automatic Weapon

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

Best AR-15 Piston Uppers & Conversion Kits

Running a Piston-Driven SIG556 Classic Against the Everyman’s AR-15

Best AR-15s: Ultimate Hands-On Guide