An AR-15 rifle with an attached silencer lies on the floor at a gun range at the NRA headquarters, in Fairfax, Va., on March 20, 2017.
An AR-15 rifle with an attached silencer lies on the floor at a gun range at the NRA headquarters, in Fairfax, Va., on March 20, 2017. Ali Rizvi TNS
An AR-15 rifle with an attached silencer lies on the floor at a gun range at the NRA headquarters, in Fairfax, Va., on March 20, 2017. Ali Rizvi TNS