Amazon.com: Ner Modulus Round Counter Kit : Toys & Games
Arduino for Nerf: Chronograph and Shot Counter : 28 Steps (with Pictures) - Instructables
Fan made Halo Assault Rifle with torch and ammo counter | Page 5
Goodberry on Twitter: "Finally got around to repainting the Halo assault rifle from Nerf. Added lights to the ammo counter and a little flashlight to the front. #HaloSpotlight https://t.co/zb0DSRGDMS" / Twitter
Prototype NERF MA40 Mag concept | Halo Costume and Prop Maker Community - 405th
Finally completed the halo ma40. Integrated ammo counter, upgraded motors and flywheels : r/Nerf
Request) Ammo Counter Replacement for Nerf MA40 : r/halo