From Washington Free Beacon:

This August saw 1.7 million background checks performed by the Bureau of Alcohol, Tobacco, Firearms, and Explosives on new gun sales, the most checks ever performed in any August since the creation of the National Instant Background Check System. The agency performed 1.6 million checks in July, the high for that month. They did a further 1.5 million in June, another all-time high.