From NSSF
The May 2020 NSSF-adjusted National Instant Criminal Background Check System (NICS) figure of 1,595,790 is an increase of 75.2 percent compared to the May 2019 NSSF-adjusted NICS figure of 910,910. For comparison, the unadjusted May 2020 FBI NICS figure 3,066,740 reflects a 32.1 percent increase from the unadjusted FBI NICS figure of 2,320,918 in May 2019.
Twenty-five states currently have at least one qualified alternative permit, which under the Brady Act allows the permit-holder, who has undergone a background check to obtain the permit, to purchase a firearm from a licensed dealer without a separate additional background check for that transfer. The number of NICS checks in these states does not include these legal transfers based on qualifying permits and NSSF does not adjust for these transfers. Recently, the states of Alabama and Michigan had law changes that affected their Brady Law standing which removed qualifying alternate permits usage for firearm transactions. These changes went into effect July 22, 2019 for Alabama, and March 3, 2020 for Michigan. In May 2020, Alabama state’s NSSF-adjusted NICS was 298.0 percent higher than May 2019, which accounts for an additional 38,877 checks over this time last year. May 2020 NICS numbers for Michigan were up 297.5% over May 2019 and account for an additional 48,097 checks.
The adjusted NICS data were derived by subtracting out NICS purpose code permit checks and permit rechecks used by states for CCW permit application checks as well as checks on active CCW permit databases. NSSF started subtracting permit rechecks in February 2016.
Though not a direct correlation to firearms sales, the NSSF-adjusted NICS data provide an additional picture of current market conditions. In addition to other purposes, NICS is used to check transactions for sales or transfers of new or used firearms. It should be noted that these statistics represent the number of firearm background checks initiated through the NICS. They do not represent the number of firearms sold or sales dollars. Based on varying state laws, local market conditions and purchase scenarios, a one-to-one correlation cannot be made between a firearm background check and a firearm sale.