U.S. (CAGE ) Code. 958B3
Your Carry-On Bag Should Be:
Up to 45 inches exterior dimensions (22 x 14 x 9 in) including handles and wheels and Able to fit comfortably into the sizer provided at the airport. *From: American Airlines web page.
Note: required dimensions may vary by airline please verify with yours first.
Checked Baggage Weight and size:
Calculate the size limits of your bag by adding the total outside dimensions of each bag add length + width + height and it should not be larger than 62 inches total and weight 50 lbs max. Baggage measuring over 62 inches and or weighting over 50 lbs will be considered oversize and extra fees may apply.
TRAVELING WITH FIREARMS AND AMMUNITION
Firearms and Ammunition:
Travelers may only transport UNLOADED firearms in a locked hard-sided container as checked baggage. The container must be completely secured from being accessed, Locked cases that can be pulled open with little effort cannot be brought aboard the aircraft. All firearms, ammunition and firearm parts, including firearm frames, receivers, clips and magazines are prohibited in carry-on baggage.
*NOTE: TSA locks might not be accepted for locking the case that contains firearms.
For more info when traveling with firearms or Ammunitions please go to the TSA web site.