According to the ATF, 358,165 other miscellaneous firearms were manufactured in the U.S. in 2014 as well. This miscellaneous group includes pistol-grip firearms, starter guns, and firearm frames and receivers.
Starter guns, like the one seen here, are used to signal the start of certain sporting events, such as swim meets and track and field races.
Many Chicago residents refuse to leave home without a gun. Find out why on CBSN: On Assignment.