prop guns in washington state?

Prop guns ( totally non firing replica weapons) are perfectly legal to buy, own, collect or display. What is NOT legal is to strap it on your hip and walk around city streets. As a comparative example, if you attempt to sell an ounce of oregano as marijuana, the INTENT is exactly the same as attempting to sell the real thing. Same with the replica weapon. To brandish, display in public or attempt to use the replica to intimidate someone as a real weapon will be the same charge.

I hope this helps and you can find it useful

yes you can buy it