AdvertisementA Brief History Of The AR-15February 28, 2018Greg MyrefacebookEmailJohn Jackson, co-owner of Capitol City Arms Supply, with an AR-15 rifle for sale at his store in Springfield, Ill., in 2013. The semi-automatic rifle has been sold to the public since the 1960s and the NRA estimates that around 8 million AR-15s and related models are in circulation. (AP)