Using Pennsylvania county-level data on firearm sales for the period 1999-2012, the present study attempts to determine if gun sales are statistically related to firearm homicides and suicides. The fixed effects results suggest that for every additional gun purchased (per 100 persons), the firearm homicide rate fell by 0.069 while the firearm suicide rate increased by 0.162. Therefore, the overall firearm violent death rate at the county level increased by 0.093 per 100,000 persons for every additional gun per 100 persons that was purchased. If 10 more guns per 100 persons were purchased, one more person each year would die from firearm violence. This increase in gun purchases is highly unlikely, however, given that, on average during the period 1999-2012, there were only 5.1 gun purchases per 100 persons annually.