managed to reduce the length of the optical sensor for the ammo counter, although at the cost of the chrony function : r/airsoft

BLOG March 2006

infrared - Sensor for detecting airsoft bullet - Electrical Engineering Stack Exchange

Airsoft Electronic Ammunition Counter Final Report - DDL Wiki

P6 KRYTAC WarSport LVOA series Custom AEG

Airgun World Magazine - 2011 May, PDF, Telescopic Sight

GUN WORLD November 2017 by Vadim Koval - Issuu

ACTIONUNION Helmet Counterweight Helmet Counterbalance NVG Counterweight for Airsoft Paintball Tactical Fast Helmet BJ PJ MH SF MK : Sports & Outdoors

Gun World 2015, PDF, Rifle

AmSJ Jan 2019 by Media Index Publishing Group - Issuu

Shooting Sports - January 2015, PDF, Sweater

Tachyon - Tachyon Electronics