DENVER - SEPTEMBER 13:  The Manager of Dave's Guns holds two Colt AR-15's, the gun on the right has a bayonet mount, flash suppressor and a collapsible stock and accepts high capacity magazines that hold over 30 rounds and can be purchased by civilians as of today, the gun on the left was legal to purchase and own with a 10 round magazine September 13, 2004 in Denver, Colorado. Between 1994 and September 13, 2004 the AR-15 with the above items could only be sold to law enforcement and military but is now legal for civilians to purchase due to the expiration of the Brady Bill.  (Photo by Thomas Cooper/Getty Images)