My Fated Weapon Is Actually a Recruitment Order

In a world where might makes right, everyone awakens their own destined weapon at the age of eighteen. The protagonist discovers that his destined weapon is actually an item from the game he loved most and hated most in his previous life. As he grows stronger, he gradually realizes that this seemingly worthless weapon can keep advancing in rank. Through countless battles, he too slowly becomes the peerless powerhouse of this world.