This is my design of a Compound bow. I've never seen or shot one in real life but this one works :-) I've printed the arms with 100% infill. The bow with 30%. You need this parts 1x bow 2x arm top 4-6x arm normal (depending on the tension. I've used 3 on every side) 2x pulley 4x M2.5x8-10 screws 2x M3x10-12 screws Print as many arrows as you like :-) (100% infill) Please hit like if you like it Cheers Stanley