Vietnamese 'Toe Popper' AKA 'Cartridge Trap'. The ground sculpt is removable if you'd like to use your own ground plane. The trap works like a landmine made with a bullet, piece of bamboo, wood board and a nail. The person steps on the bullet, which pushes it into the nail and makes it explode.
Made specifically for use in UE4, but it should work fine in any game engine.
Comes with base/norm/metal maps in the zip folder.