454 magnum revolver by Oscar Chichoni
It’s sort of unknown thus far, but there are some images!
The Flying monster I don’t know. Could be another ~type of Muto or another monster all together. But we do know that Muto is an eight-legged monster x)
The top image might not be the final design tho since it is from the older trailer.
Neon Genesis Evangelion and Pacific Rim