I'm betting the TSA folks would have a problem with the equipment. As I remember from model rocket days; battery pack (usually 6 D cell), wires (one about 12 feet long going from a plastic "launch button" to the battery pack; Short wires from battery pack ending in a nub where igniters are fitted), igniters (Small "matches" with metal instead of cardboard). Frankly, the setup is great for what it is designed to do...ignite a small rocket motor.
(note, witout something to ignight, the above would be no more harmless than a pack of matches.)