Merge Bullet Index into Guns and Gunplay Tropes, since every single trope on Bullet Index is already on Guns and Gunplay Tropes, too (unsurprisingly, since you can't use a bullet without a gun).

Merge Guns Do Not Work That Way into Guns and Gunplay Tropes, since both are indexes covering the same material.

Turn Guns Do Not Work That Way into a supertrope.