Where can you find the musket piece in uncharted golden abyss?

In "Uncharted: Golden Abyss," the musket piece can be found in the chapter titled "The Treasure of the Temple." Specifically, you need to explore the ruins after solving a puzzle involving a waterfall. Look for the musket piece on a ledge near the area where you encounter the enemies. It's essential to thoroughly search the environment, as some collectibles can be easily missed.