State of Washington has Requirements for purchase or transfer of SAR (Semi-Automatic Rifle). One of the requirements is a firearms safety course completed within 5 years. 

https://sporting-systems.com/free-1639-training/

​This course is FREE and informational.

 On the background check paperwork you will need to attest to the fact that you have taken such a course.

Thank you Sporting Systems for your commitment to Washington State resident's 2A rights.