Riverton Heights Gun shop was originally located in a strip mall at 170th and International Blvd, near Sea-Tac. He later moved to a building near Foster. The gunsmiths name was Mort Bossler. I use to stop by there when walking home from school. Mort always welcomed kids. He built my first rifle on a mauser action in 6.5X55. Prior to gunsmithing he was a machinist at Boeing.