The M48 Tomahawk is a cut tactical axe from Counter-Strike: Global Offensive.
References to view model textures were removed in the July 1, 2014 Update (Operation Breakout) from the game files along with the Survival Bowie (before its introduction in Operation Wildfire) and the Classic Knife. No models or textures are known to exist.
Despite the fact that the weapon is an axe, the view model texture file classifies it as a knife. This is likely because the axe would replace the knife inventory slot.
- M48 Hawk Tactical Tomahawk on Unitedcutlery.com