In this video, we explore how the M16 and M4 rifles were engineered and built, from their Cold War origins to their role as modern NATO service weapons. You’ll learn about: The direct impingement gas system Materials and manufacturing techniques Technical specifications and performance Accuracy vs reliability design philosophy The evolution from M16 to M4 and beyond Perfect for fans of military engineering, firearms technology, and educational documentaries. #M16 #M4 #FirearmsEngineering #MilitaryTechnology #WeaponsHistory #HowItsBuilt #AR15 #Documentary