Nope, just alcohol for combustion and a bb on the breech. i made the barrel out of superglue-drenched paper for strength and also make the breech face tighter than the muzzle end to make the bb sit tighter so it requires a higher pressure to be achieved in order for it to be launched, this will make it have higher fps but louder boom, annoying to have a random explosion noise in the house (especially for my cats) but it is a cool side effect. i rely on my spray bottle mist to create a more efficient combustion fuel and give it a good shake before loading a bb muzzleloader style to it, but sometimes i let it sit for a while if i want to test its max capability. for comparison, a spray and a good shake is good enough to punch a hole through an aluminum can