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6 year oldThe firms included car rental giants Hertz and Enterprise, which offered discounts for NRA members.
The moves follow NRA leader Wayne LaPierre's speech defending gun rights.
They were the NRA's first public comments since a deadly school shooting in Florida.
Mr LaPierre said "opportunists" were using the 14 February tragedy, in which 17 people were killed, to expand gun control and abolish US gun rights.
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