Necessary to extend the phases of the game with two children before picking up everything and redo chargers. Personally to save the spring and do not pack the darts I can put 16 or 17 and only on the day you play. I hesitated between 3 and 4 stars, the price made me go for three. Transparent one side to see what remains. The nerve chargers are interchangeable. They fit perfectly on weapons that had originally loader 6