No matter what happens on Super Bowl Sunday, Brock Purdy and the San Francisco 49ers will have some shiny, new hardware ... 'cause the whole squad just got hooked up with some brand new team-themed chains!!
TMZ Sports is told ... the NFC champions received new bling from The GLD Shop's private popup outside their Levi's Stadium locker room last weekend ... right before flying out to Sin City for their matchup against the Chiefs.