... laser gun,put 4AA batteries into the box, b/o water gunProduct packing: Display boxProduct size: 42X24.5X5 ... a traditional manual water gun with your child? Do you still seek anadvanced and exciting water gun? Do ... You just need to install the batteries, fill with water, pull the trigger lightly, the gun will ... the right, take down the gun grip, fill with water, and then push the switch to the left, now ...