May 2020,
"Thousands of U.S. gun dealers were urged not to finalize surging weapons' sales until the FBI completes background checks even if the review process extends beyond the mandated three business days.
The National Shooting Sports Foundation issued the advisory at the start of a rush on the firearms market as a crush of gun buyers flooded the bureau’s system during the coronavirus health emergency.
Larry Keane, general counsel for the firearm industry’s association, said the advisory was issued in March after dealers in more than two dozen states received notices from the bureau indicating that background reviews would not be completed in time, in some cases for up to 28 days."
As for me the federal performance is NOT an acceptable standard.
"Thousands of U.S. gun dealers were urged not to finalize surging weapons' sales until the FBI completes background checks even if the review process extends beyond the mandated three business days.
The National Shooting Sports Foundation issued the advisory at the start of a rush on the firearms market as a crush of gun buyers flooded the bureau’s system during the coronavirus health emergency.
Larry Keane, general counsel for the firearm industry’s association, said the advisory was issued in March after dealers in more than two dozen states received notices from the bureau indicating that background reviews would not be completed in time, in some cases for up to 28 days."

Pandemic-fueled surge in gun sales overwhelms FBI background check system; dealers urged to wait on sales
Gun dealers are urged to wait on the FBI as firearm buyers flood the background check system during the coronavirus pandemic.
www.usatoday.com
As for me the federal performance is NOT an acceptable standard.