hi this instructable is to show how to build a very simple knex rubber band gun for starters and yes this probably can be used in battle.:):):) enjoy!!!
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Step 1: Pieces
these r the pieces u need
Step 2: The Building Part
ok get the square little lego piece and connect it on the bottom of the long lego piece then get the bright yellow/green piece and put it in the middle of the long lego piece. then get the red knex piece and connect it to the bright yellow/green piece.then get one of the short green pieces and connect it to the red knex piece then connect the blue circle piece and connect it to the short green piece connected onto the red piece. get the long skinny blue piece and connect it to the top of the blue circle then connect the orange piece the the long blue skinny piece connected onto the blue circle. then connect the other short green piece to the orange piece then connect the grey piece to the short skinny green piece,face down.
Step 3: FIRING!!
get the rubber band (has to be kinda small to go far) and stretch it from the grey piece to the back of the red piece. then flick the rubber band off the red piece with ur thumb and it should go really far HOPE U LIKED IT COMMENT ALL U WANT!!!