THIS is the ultimate knex gun
the big chunky one has a 7 shot magasine and the smaller one has a crank operated chain which at the moment has 15 shots but can be made longer.
the big one fires red bars aboiut 40ft if you use the right rubberbands and they still hurt if they hit you at 20ft:):)
the smaller one fires yellow bars about 30ft with slightly less power
if anyone likes these i will put up full instructions