Mad Dog Knives Shrike Classic “Omega” w/Mirror Polished Blade, ATAK & Slip Sheaths. This knife is the last of the Shrike “Classics” with the 6.75″ long blade and it is engraved with the “Omega” symbol to signify it’s importance. This particular knife also is engraved with a blood drop on the spine to signify that it drew blood from Mad Dog at some point while he was making the knife. The blood drop is extremely rare and only engraved on a couple of other knives that I am aware of. The knife is a pure beauty and its the only one like it.