They are a 28 store sporting goods chain in California with primary emphasis on fishing and firearms. I don't think they have any Oregon locations but e-mail marketing often doesn't know locations.
Not sure a boycott is the right answer here. IIRC, a lot of sporting goods stores have been dropping firearms and ammunition and some have gone to dropping any vendors affiliated with any firearms or ammunition. Those are the ones to boycott. One that still carries and supports the industry...
http://www.foxnews.com/us/2018/07/11/academy-sports-manager-fired-weeks-after-intercepting-gun-thief-suspect-in-florida-store-lawyer-says.html
Looks like another store has messed up priorities.
So when word of this policy spreads in the criminal community, won't they all just go to that...
You might want to wait until you actually receive it. My understanding is the PC9s shipping to California don't have threaded barrels. I'd hate for you to order something to have ready for the rifle and then discover you can't mount it.