Introduction: Knex Two Stage Railgun
This is a mini version of something that PerfectDuck had invented.
How it works:
The big block trigger on wheels is pulled back to the back of the gun where it is locked in place by the main trigger. Then the firing pin is pulled back on the block trigger and the block trigger's trigger is locked in place. When the main trigger is pulled, the block trigger is pulled to the front of the gun by the rubber bands connected to the crossbow arm and then the block trigger's trigger is pushed out of the way by the green connector on the side of the gun and the block trigger shoots. This gives the bullet, which is in the block trigger, two times the momentum of a regular gun, thus maximizing ranges.
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Please be positive and constructive.