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Engineering ‘The Black Rifle’: Why the AR-15 Is the Most Popular Gun in the U.S.

The AR-15 is a trademark, and since its original patent, the machine has gone through many iterations. Here’s what you should know about where it is today.

Published On 05/26/2018
7:04 AM EDT
Engineering ‘The Black Rifle’: Why the AR-15 Is the Most Popular Gun in the U.S.