It's bronze. You might plate them...
Twisted Gun
United Nations Sculpture Garden, most notable for the "twisted gun" sculpture, one of the most photographed spots at the UN. This sculpture was a gift from the Government of Luxembourg presented to the United Nations in 1988. It consists of a large replica in bronze of a 45-calibre revolver, the barrel of which is tied into a knot. It was created in 1980 as a peace symbol by artist Karl Fredrik Reutersward, and is located in the Visitor's Plaza, facing First Avenue at 45th Street.
Works for me. I’ll do it up in bronze plating. hehehe.