Alloy of Copper, Tin and Zinc for Making Cannons

This page is the CodyCross answer for the clue below from Photography, Group 2018, Puzzle 5 (Editing Process).

Question is: Alloy of Copper, Tin and Zinc for Making Cannons

and the answer is: GUNMETAL

Word Meaning:

GUNMETAL — (historical) A type of bronze used for making cannons.

Definitions from Wiktionary.