About this 3D model
Simple crosshair set for the nerf disruptor. the back slot has notches in it so you can use it to guage gun angle with the target. The crosshairs just slide on but the back slot is secured with an m4 screw and nut, or you could tape a cut piece of chopstick in there to secure it. You'll need to wind some thread around the notches of the crosshair part. Happy printing!