To require the Director of the Federal Bureau of Investigation to report to the Congress semiannually on the number of firearms transfers resulting from the failure to complete a background check within 3 business days, and the procedures followed after it is discovered that a firearm transfer has been made to a transferee who is ineligible to receive a firearm.

Accidental Firearms Transfers Reporting Act of 2017 This bill requires the Federal Bureau of Investigation (FBI) to submit a biannual report to Congress on the number of proposed firearm transfers where: (1) a licensed gun dealer submitted a background check through the National Instant Criminal History Background Check System (NICS), (2) NICS failed to respond to the licensed gun dealer within three business days, and (3) the licensed gun dealer completed the transfer. The FBI must also report on the procedures followed once the transferee is discovered to be ineligible.