From Townhall:

April 2018 saw the most gun-related checks run through the Federal Bureau of Investigation’s background check system.

The National Instant Criminal Background Check System (NICS) ran 2,233,213 checks in April, according to an FBI document. That’s nearly 90,000 more checks than the previous April record set in 2016. It also represents the second month in a row to set a record with March seeing 2,767,699 checks