My mate works there, il give them a ring tomorrow about it, in regards to faulty chrono, highly doubt it as it's been spot on with 40 other players guns chronoed for the same game. Don't get me wrong I like that it's a little power house, just a worry in terms of playing any other sites with it.. Grimsby arena Airsoft just don't chrono... Ever.. P.s Wouldn't recommend going there either. The firehawk has a yellow sticker on the box reading (HIGH muzzle velocity version) could this be a cause?