i also agree, go in and explain that although they believe it to only be worth 50 quid, you know what it was and to buy a new one it would cost a total of.....(rifle,sights, extras you had etc etc). Then say that you feel it would only be fair if they would give you that total to choose a new set up from their stock at cost value. That way you get a new rifle and are suitably compensated, they dont make any profit from the transaction but apart from time no one would be out of pocket. If they dont go for it then say you have no choice to call the police and trading standards.
Tony
i ha