The Transportation Safety Administration said 2,653 firearms -- more than 2,000 of which were loaded -- were confiscated from carry-on bags in 2015.
That number is a 20 percent increase from the 2,212 firearms that were confiscated in 2014, according to statistics released by TSA on Thursday. It breaks down to an average of seven incidents per day.
The firearms were found at 236 airports across the country, 12 more airports than 2014.
Phoenix Sky Harbor International Airport had the fifth highest amount of guns seized by TSA at 73.
Dallas/Forth Worth International Airport had the highest at 153 followed by Hartsfield-Jackson Atlanta International Airport (144), George Bush Intercontinental Airport - Houston (100) and Denver International Airport (90), respectively.
TSA said it screened over 708 million passengers -- or about 1.9 million each day -- throughout the year, an increase in 40 million passengers from 2014. That doesn't include the $1.6 billion carry-on bags, 432 million checked bags or 12.9 million airport employees that were scanned throughout the year.
The TSA also released some of the odder items that security agents found in people's carry-on bags.
Among them, black powder was found in bags at Salt Lake City, Denver, Houston, Savannah and Boston; live smoke grenades were found in Las Vegas, Tucson, Austin, Columbus, Tulsa and Madison; a sickle was found in Newark; a Chihuahua was found in a checked bag at LaGuardia Airport; a children's sword discovered in Oakland; a canon ball was found in Lexington; and a tomahawk found in Las Vegas.
MAP: Odd items found stuffed in carry-on bags at airports across the country
Some passengers, according to TSA, tried to hide banned items in other items. Agents found a D-sized battery with a screw-off top filled with marijuana; a pocket knife taped to a fishing lure; and two handguns, gun parts and ammunition were hidden in three amplifiers.
When it came to TSA Pre-Check, the program that allowed passengers to go through an expedited screening process, 2 million passengers enrolled. In that program, less than 2 percent of passengers had to wait in line longer than 20 minutes.