Table:
text: 300 metre rifle prone
World Championships, Men
World Championships, Men
Year_ Place Gold Silver Bronze
1982 Caracas Victor Daniltchenko ( URS ) Malcolm Cooper ( GBR ) Ernest van de Zande ( USA )
1986 Skoevde Malcolm Cooper ( GBR ) Pekka Roeppaenen ( FIN ) Glenn Dubis ( USA )
1990 Moscow Harald Stenvaag ( NOR ) Norbert Sturny ( SUI ) Thomas Tamas ( USA )
1994 Tolmezzo Bernd Ruecker ( GER ) Petr Kurka ( CZE ) Roger Chassat ( FRA )
1998 Zaragoza Bengt Andersson ( SWE ) Tapio Saynevirta ( FIN ) Glenn Dubis ( USA )

Question: After 1982, what gold medal did Mark Walters win at the World Men's 300m Prone Championships in Moscow?