Benefits (How this will benefit the server and game as a whole): More tactical options.
Details (Description of how you think this would work, the benefits, etc): Right-clicking on the bayonet allows you to pick "change attachment point". Using it on any weapon will have you tie the bayonet to the grip/stock, facing down. This turns the melee attack into a "pickaxe" like swing, giving it slow speed, high damage and armor pierce.
Having this equipped decreases recoil because you're clutching the weapon as tightly as possible out of fear of stabbing yourself.
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Implementation (Optional, if you have an idea how to implement it): Hold the families of the coders at a gunpoint.