Trump, the first sitting president to address the group's annual convention in more than 30 years, assured the audience that he would defend their right to bear arms.
"You have a true friend and champion in the White House," he said.
The president's trip to Atlanta also will serve as his first foray into a congressional race since taking office. Trump is expected to attend a private fundraiser for Republican congressional candidate Karen Handel, a local election that has become a national referendum on his presidency.
The last president to address an NRA convention was Ronald Reagan, who spoke to the 1983 gathering, according to the powerful gun rights lobby. Trump's appearance in Atlanta has sparked protests.
Also Read
The NRA is pushing for federal legislation to make any state's concealed-carry permits valid nationwide. Opponents say the move would effectively turn the weakest gun standards in the nation into the law of the land. The GOP-led Congress already passed a resolution to block a rule that would have kept guns out of the hands of certain people with mental disorders, and Trump quickly signed it.
White House press secretary Sean Spicer said on the plane trip from Washington that NRA members supported Trump during the election based on his strong commitment to gun rights. He also cited Trump's appointment of Judge Neil Gorsuch to the Supreme Court.
Kevin Michalowski, executive editor of a magazine published by the United States Concealed Carry Association, said seeing that a president will be addressing the annual meeting "gives the gun industry a feeling of he's on our side".
The political landscape has changed dramatically with a president now in the White House friendly to the gun industry and gun rights. But Michalowski said it's premature to get complacent with gun sales having tapered off since the election and "there's always a group out there that opposes the Second Amendment and what it stands for".
Disclaimer: No Business Standard Journalist was involved in creation of this content