And if you're ordering parts, make sure they send you the correct ones.....I've had a few occasions where the wrong parts are sent. I ordered a complete valve with pin and spring and they only sent the bare valve. I reached out to them for the spring and firing pin and was sent the wrong ones. I didn't bother after that.
Don't email Hatsan customer service. Don't call them. Waste of time. Go to their website and submit a request for service email. List the parts and part numbers that you want. Within a couple of business days Hatsan will email you with an itemized list of the parts and prices. You can order them right then or send Hatsan an amended request. I've never had any problem dealing with Hatsan since SteveP taught me this trick.