Hi, Does anybody have any suggestions as to where I can find a MATO M4A1 76 air soft unit? Mine took a dump shortly after using it only a couple of times. The simulated canon fire stopped working too. Could this be a bad radio button or is it the air soft unit? when I first tried the air soft it would shoot BB's only every other time. In between the actual BB fireing was a simulated fire. I wasn't sure if this was how the MATO unit was supposed to work or if it was a malfunction.