Rabbits are one thing. What you really want is a gun.
Preston reaches into his pointy hat and focuses. Its stars and moons begin to glow. Inside, light wells and flows like a viscous liquid. Then, he withdraws the item of his choosing, stealing it from somewhere in the world.
Exert your Mind, choose a basic, mundane object that Fits Inside A Messenger Bag (10 liters), and spend 1 Minute fabricating your object. You must make a Perception + Occult roll, Difficulty dependent on the specificity of the created item. For example, "shirt" would be difficulty 5, "Police uniform" would be difficulty 9. The roll's outcome determines overall quality and how well the item fits the request. Created object lasts forever.
The GM always has final say over the created object if a specific request is made. Cannot create explosives.