A report released Wednesday by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) indicates that gun manufacturing in the United States has seen a 140 percent spike during the Obama administration. A spokesman for the Detroit Police Department said the ATF is handling the investigation.

Representatives for the ATF drew no conclusions from the data, saying only that the report provides “a broader picture of the state of firearms commerce in the United States today”.

The lack of movement on gun control may be the president’s greatest frustration but the citizenry would more likely say that race relations have been the greatest disappointment of his time in office.

Overall, U.S. gun manufacturing has almost quadrupled since 2001, while imports of firearms from other countries fell sharply after several years of growth.

Joe Neville, the director of political affairs for the National Association for Gun Rights, told The Hill that the significant increase in gun production is a result of the “constant attack on our constitutional right to keep and bear arms” by the Obama administration.

The gun industry is using a “scare tactic” to increase gun sales, said Mark Prentice, spokesman for Americans for Responsible Solutions, which is the gun safety group run by former congresswoman Gabby Giffords, who survived a 2011 mass shooting in Tucson. Almost half a million of these components, which are classified as firearms by the ATF, were produced in 2013, a surge of more than 700 percent since 2009. Meanwhile, gun manufacturers produced 3.9 million rifles and 1.2 million shotguns.

“Even in their homes, many gun owners prefer using handguns for self-defense”, Pratt said.