The gun industry may be headed for a slump after eight years of explosive growth under former President Barack Obama.Photo by Mike SaechangFrom December through February, the number of federal background checks conducted each month declined from the same month a year ago, according to the Associated Press. While not an exact measure of total firearm sales, background checks are considered a key measure of how gun manufacturers are performing.One reason for the softening demand, some gun industry experts say, is that potential gun buyers are no longer worried Washington will issue new regulations restricting gun sales.(RELATED: Surprise! Senator Attacking The Second Amendment Knows Nothing About Guns)“President Obama was the best gun salesman the world has ever seen,” Karl Sorken, a production manager at Houston-based Battle Rifle Co., told the AP.During Obama’s tenure, customers rushed to buy firearms before the administration could follow through on its goal of placing tighter controls on the type and number of guns that could be sold. The gun industry boomed on the surging demand: The number of U.S. companies licensed to make firearms jumped 362 percent over the decade ending in 2015.Ironically, President Donald Trump’s outspoken support of the Second Amendment and gun manufacturers may actually be contributing to an industry-wide slowdown.The FBI conducted about 500,000 fewer background checks in December 2016 than it did in 2015, The Washington Post reported. The year-over-year drop off was significant, because the holiday season is normally a busy time for dealers selling guns as Christmas gifts.