The National Rifle Association's Political Victory Fund raised a record $2.4 million in March — its biggest monthly haul in 20 years — attributing it to calls for stricter gun controls after the Parkland school massacre in Florida in February.

Survivors of the Feb. 14 shooting at Marjory Stoneman Douglas High School that killed 17 and injured 17 others took to social media and lobbied legislators in Florida and Washington to demand stronger gun laws.

They also organized the "March for Our Lives" rally March 24 that brought as many as 1.2 million people to the nation's capital.

According to Federal Election Commission data reported by The Washington Post, the $1.9 million of the $2.4 million total came from small donations of $200 or less.

The figure, about 80 percent of the month's total amount, followed similar monthly patterns of small-dollar contributions to the association.

In addition, a report by the Chicago Tribune found the NRA aggressively stepped up its digital advertising as Parkland survivors ramped up their efforts.

The NRA also began a campaign to add 100,000 new members in 100 days, saying "the threat to our Second Amendment has never been greater," the Post reports.

The NRA's Political Victory Fund is a political action committee that issues the group's legislative scorecards and makes donations to candidates and campaigns during elections.