A number of hopefuls, including Trump's closest rival, Florida Governor Ron DeSantis, are deliberating if and when to jump into the 2024 race to challenge the former president for the nomination.
Trump, whom the NRA enthusiastically backed in 2016 before he was even officially declared the Republican presidential candidate, will address gun aficionados in person on Friday.
DeSantis, and other White House hopefuls, Nikki Haley and Senator Tim Scott, will do so by video message.
Trump's campaign website says he will "always defend your Second Amendment right to keep and bear arms," but does not provide detailed policy proposals.
For some fervent NRA members, however, neither Trump nor DeSantis are committed enough to the cause.