Rock island

[enbloc8]

Weren't they mostly destroyed by GIs right before the surrender?

Not all of them...there's a published photo taken in occupied Manila of a mother and child evading a Japanese sentry with what is obviously an M1903 with fixed bayonet. And, some were "reissued" to a group of US POWs used as extras in a Japanese propaganda film around 1943.

But yes, from accounts I've read, many of them were either piled up and burned, or thrown in the ocean. Some kept fighting in the hands of the guerilla forces, but after years of tropical conditions and homemade ammunition I wonder how salvageable they would have been.