Who in Porltand / Vancouver area sells Ar accessories? I forgot to pick up everything I needed from the gun show.
There's probably somewhere that sells them in the Portland area but if you can't find anybody just order one from Rainier... You'll get it as fast as USPS can deliver Rainier Arms, LLC™ | Browse | Back End Items | Delta Ring Assembly
There's a small shop down by Salem airport that does a lot of AR stuff, he may stock small parts. Rainer is just a day away via mail.