The standard spud gun design is that of a simple muzzle loader. This design include a bolt-action assembly that allows for rapid reloading and potato projectile deployment.
Jeremy Cook shares his designs for a bolt-action style spud gun. Rather than jam potatoes down into the muzzle, as you would with a traditional spud gun, his design uses a bolt-action assembly just like you’d find a bolt-action hunting rifle. Open the assembly, stuff the potato in, close and lock the bolt, and you’re in business.
Hit up the link below to read more about his design and see the bolt in action.
The Miniature Bolt-Action Pneumatic Potato Gun [via Hack A Day]