To make a gun in Little Alchemy, you need to combine **metal** and **bullet**. To make metal, you need to combine **fire** and **stone**. To make stone, you need to combine **lava** and **air** or **earth** and **pressure**. To make lava, you need to combine earth and fire. To make bullet, you need to combine **gunpowder** and metal. To make gunpowder, you need to combine fire and dust. To make dust, you need to combine earth and air. Alternatively, you can also make gun in Little Alchemy 2 by combining bullet with steel, bow, or container .
Here are the steps:
1. Combine fire and earth to create lava.
2. Combine lava and air or earth and pressure to create stone.
3. Combine fire and stone to create metal.
4. Combine metal and gunpowder to create bullet.
5. Combine bullet and metal to create gun .
I hope this helps! Let me know if there's anything else I can help with.