👉 The Sum Weapon is a versatile and dynamic combat system introduced by Team Fortress 2, where players can combine weapons into a single, powerful weapon through a rapid, chain-reaction process. This mechanic allows for the creation of weapons like the M16 Assault Rifle + M4 Carbine or the M249 SAW + M16, which significantly enhance firepower and versatility on the battlefield. The Sum Weapon's ability to transform weapons in real-time makes it a strategic asset, enabling quick adaptation to changing combat situations and maximizing damage output.