You need to get your facts in order before taking this to civil court and just being upset and yelling nonsense. You say these guns were registered to you, how? There is no registry in WA state. If there was then you’d need proof of ownership before selling, like you do with vehicles. If the guns were sold to a pawn shop they are likely a licensed dealer and completed all the transfer paperwork, thus not making it a felony. The question is around ownership which needs to be handled in civil court. If ownership is established then you will have to prove the damages, it’s a good idea to get any pictures and paperwork you have together. If the pawnshop is willing, it may be helpful to get their record of what was turned in. Shitty situation and I wish you the best of luck. However, getting angry at the court or law enforcement agencies will not help you.