All persons carrying firearms and ammunition in checked baggage, including Law Enforcement Officers, must comply with the provisions of 49 CFR § 1540.111. Following is a summary of key requirements of this section and other regulatory provisions.
All firearms must be declared to the air carrier during the ticket counter check-in process. Travelers with firearms should check-in at the ticket counter and not use electronic check-in (e.g., kiosks or the Internet).
All declared firearms must be unloaded and transported in a locked hard-sided container. Travelers are advised to place all firearm parts in a locked hard-sided container to avoid violations.
Access to the declared firearm must be restricted, with only the passenger possessing the container combination or key to the lock. In the event TSA must open the container for inspection, it is preferred that the passenger turn over the key or combination to the screener.
Any ammunition transported must be placed in checked baggage and securely packed in fiber (such as cardboard), wood or metal boxes or other packaging specifically designed to carry small amounts of ammunition. firearm magazines/clips do not satisfy the packaging requirement unless they provide a complete and secure enclosure of the ammunition (e.g., by securely covering the exposed portions of the magazine or by securely placing the magazine in a pouch, holder, holster or lanyard). The ammunition may also be located in the same hard-sided case as the firearm as long as it is properly packed as described here.
It is also recommended that the ammunition package in checked baggage be stabilized, either by tapping it to the interior wall of the bag, or by use of packing material or other means to ensure the ammunition package does not move about the interior of the bag during transportation.
Black powder, including Pyrodex, and percussion caps used with black-powder type firearms are not permitted on board aircraft, either as accessible property or in checked baggage.