The Head Banger is a melee weapon for the Demolisher class in Blitz Brigade. It the current top-of-the-line melee weapon available for the Demolisher. For stats, the damage is great, beating the Brass Bomber. Overall, this is a great melee weapon. It is heavily based on the Guitar Rifle from another TF2-based game, The Respawnables, but looks more like a balalaika than a guitar.
Other (formerly) tournament exclusive weapons: