Maybe. But if it were RyanAir they would have tried to charge you an artillery surcharge. At that point it would have been discovered.Quite normal now. Walk on to the main stations in France and you'll see soldiers. Including the metro (underground) stations.
Worryingly, last time I was checking in to board a plane there were two armed cops there. Glued to their phones and not actually watching what was going on. I could have wheeled some artillery past them and I doubt they would have noticed :/