Simple But Powerfull Knex Shooter!

OK well it pretty simple and it leaves welts on my friends so I think its pretty powerful

and please rate and remember this is my first insturctable so please be nice thank you ..and i can take some critisism

all you need is one of those dark gray conector and an elastic band

first pic: hold the rubber band like this

2 pic: get the gray conecter and pull (it will explain better in the pic)