Q&A for How to Make a High Powered Pen Gun

If fired at close enough range, then yes. The pen has a sharp point that can prick skin.

If shot at close range, it might. Remember to be careful with projectiles and to never shoot at the facial area or other sensitive spots.

Capri Sun straws, possibly. Perhaps toothpicks or sticks.

Just pull the elastic rubber band further with the ink cartridge and let go, it should shoot farther. If that doesn't help, read back through the instructions and make sure you did everything correctly.

Not much. It depends on how much you pull the rubber band back. Note that you might want to use a smaller rubber band for the gun.

Try sticking the ink cartridge hard enough down the barrel. If that doesn't work, carefully try biting it off. To do this, bite the end of the pen (not too near the bottom part) and slide it out by moving your teeth ever so slightly towards the bottom. Make sure to clean the pen first before doing this.