1. Short title This Act may be cited as the Gun Show Loophole Closing Act of 2017 . 2. Gun show background check (a) Findings The Congress finds that— (1) approximately 5,200 traditional gun shows are held annually across the United States, attracting thousands of attendees per show and hundreds of Federal firearms licensees and unlicensed firearms sellers; and (2) gun shows at which firearms are exhibited or offered for sale or exchange provide a convenient and centralized commercial location where criminals and other prohibited persons obtain firearms without background checks and without records that enable firearm tracing. (b) Definitions Section 921(a) of title 18, United States Code, is amended by adding at the end the following: (36) Gun show The term gun show — (A) means any event at which 50 or more firearms are offered or exhibited for sale, exchange, or transfer, if one or more of the firearms has been shipped or transported in, or otherwise affects, interstate or foreign commerce; (B) does not include an offer or exhibit of firearms for sale, exchange, or transfer by an individual from the personal collection of that individual, at the private residence of that individual, if the individual is not required to be licensed under section 923; and (C) does not include an offer or exhibit of firearms for sale, exchange, or transfer at events— (i) where not more than 100 firearms are offered or exhibited for sale, exchange or transfer; (ii) that are conducted by private, not-for-profit organizations whose primary purpose is owning and maintaining real property for the purpose of hunting activities