What are the liquid rules at Doha airport?
Which items are not allowed on Qatar Airways?
Ammunition and firearms. Ammunition. Checked baggage. on a Qatar Airways flight if it is declared to the airline at check in. The required licences and documentation for their ammunition must be provided to the appropriate local authorities in the States they are flying to and from. 

Batteries and battery-powered devices. Please switch off all battery-powered devices, if they are carried in your checked baggage.  Do not place them in sleep or hibernation mode, and ensure that you take measures to prevent unintentional activation and damage to your device(s). . 
Compressed gas. Avalanche rescue backpack.