Requires only 3 (EA) M3 nuts and bolts. Also optionally requires a small amount of super glue.
Front sight is elevation adjusted. Tested on a 150FPS blaster at typical Nerf engagement distances. Rear sight (Windage) may be adjusted utilizing the knob.
Bonus: Faux red dot (RDS)/reflex sight and mount. Installs with 2 (EA) M3 nuts and bolts. Print as imported, no supports required.
The author remixed this model.
Minimized/simplified remix.