Semi Autos (Face the Truth)
Semi auto guns are very cool. I agree but we have to face the facts. The way a real gun works is the pin hit the primer on the bullet igniting the powder and the extra gas is used to release the shell and load another bullet. How can we replicate this powerfully. Even today real bolt action guns are more powerful than semi autos. I am afraid to say that is just isn't practical to make that out of knex.