Hey Sam,How long have you had the gun?Here is what I would do....in descending order. 1) If the gun is less than 30 days old, I would send it back to whomever you bought it from (PA or Airgun Depot....) and have them fix it. Likely this issue will not go away by itself. So if it can be fixed for fee, I'd do it. Hatsan should pay for shipping both ways. 2) If the gun is more than 30 days old, but less than 1 year, I would send it back to Hatsan USA in AR. This is a safety issue and covered under warranty - they should pay for shipping both ways. 3) If you are pretty handy -> take the trigger out of the gun and do what others have suggested. If you do this within 1 year of purchase, technically, the manufactures warranty is voided for any further (free) service.__________________________________________Having experience with the Quattro trigger, I personally would take out/tune it as others have suggested, but you have to understand the consequences of your action. Most likely your issue can be solved pretty easily although you may find it frustrating.My recent experience with Hatsan with a broken trigger sear has been interesting. Hatsan USA (& Rick Eutsler) initially said my Hatsan 95 warranty was voided since I took the gun apart; they would not sell me the sear or a whole trigger assembly. So I squawked and said their customer service was driving me away from their products (I own 9 Hatsans).Then -> Graciously, they sent me everything I needed free of charge!!!!. So Hatsan wants their gun owners to be happy........Good Luck My two cents.............+1:-)
Sending it back is probably the safest thing for you to do. Since it's intermittent, that's harder to define what exactly is the cause. Problem could be anything from a floating metal chip, or even alignment in the powerplant. Triggers are dangerous to work on for the unknowing.