Big red flag to Uncle Sam.
Here's an excerpt from the interweb.
"Federal law does not limit the number of guns a person may buy in any given time period, but does require federal firearm licensees ("FFLs") to report multiple sales of handguns to ATF and other specified law enforcement agencies.12 "Multiple sales" are defined under federal law as the sale of two or more handguns by a federally licensed firearms dealer (FFL) to a non-FFL within five consecutive business days.13 This reporting requirement was created to enable law enforcement to "monitor and deter illegal interstate commerce in pistols and revolvers by unlicensed persons,"14 although there is no federal requirement that law enforcement do so."
Here's an excerpt from the interweb.
"Federal law does not limit the number of guns a person may buy in any given time period, but does require federal firearm licensees ("FFLs") to report multiple sales of handguns to ATF and other specified law enforcement agencies.12 "Multiple sales" are defined under federal law as the sale of two or more handguns by a federally licensed firearms dealer (FFL) to a non-FFL within five consecutive business days.13 This reporting requirement was created to enable law enforcement to "monitor and deter illegal interstate commerce in pistols and revolvers by unlicensed persons,"14 although there is no federal requirement that law enforcement do so."