My vintage nerf gatling gun stopped working with just a hiss of air when the trigger was pulled.
I suspected it had been dropped by the kids and something internally had broken.
It was easy enough to take apart a dozen or so screws and that was it. The attachment to the back of the main piston had broken off. The blue part in this picture is a fish tank air hose part I used for the repair.
I cut the end off the air hose was cut off as the old broken attachment was stuck inside. I warmed the hose in some boiling water to soften it before pushing it on to the new connector.
Next I drilled out the hole in the back of the piston to 5mm which was big enough to make the new connector a push fit. I secured it with some hot glue.
Job done gun works just like it did before.