ALMOST LOST A NUT

My 48did the same thing at about the same number of shots. I took it apart and the stem had came out of the piston. It was still under warranty so I called Umarex, all they needed was a copy of the sales reciept. They sent me a new pistons no questions asked.

1537552013_6793032145ba52e8d0e4332.00905216_48 piston.JPG