12.7mm_ammo

1. metal plus metal. makes 1 sharpened_metal. 12.7mm_ammo required 2 sharpened_metal. multiple t required.
2. sharpened_metal plus hammer. makes 1 broken_ammo. multiple t required.
3. broken_ammo plus sharpened_metal. makes 1 12.7mm_ammo. note! multiple t required.