If you aren’t familiar with it, meet the AR-15.
This is an AR-15-style semi-automatic assault weapon. Currently there are no federal restrictions on owning one.
AP
Since 2012, the AR-15-style assault rifle has been involved in seven different large-scale shootings.
Charles Krupa / AP
July 20, 2012: Twelve people were killed and 70 others were injured when James Holmes opened fire in a movie theater.
Stringer / Reuters
Dec. 11, 2012: Two people were killed and a third was seriously wounded in Clackamas County, Ore., when Jacob Roberts opened fire in a local shopping mall.
STEVE DIPAOLA / Reuters
