Stop calling it DI - Why no one uses it anymore

Uncover the persistent myth surrounding one of America's most iconic rifles in this in-depth firearms education video from Military Arms Channel: "Stop Calling It DI - Why No One Uses It Anymore." Dive into the technical truth behind the AR-15 and M16 operating system – it's NOT direct gas impingement (DI) as commonly mislabeled, but Eugene Stoner's innovative "true expanding gas system" patented decades ago.
Explore how the AR's unique design works: gas travels through the tube into an expansion chamber between the bolt and carrier, where piston rings seal and excess vents out – creating a lightweight, soft-shooting, reliable internal piston setup that's powered U.S. forces for over 60 years. Compare it to true DI rifles like the French MAS-49, where gas directly impacts the carrier face without chambers or rings. Demonstrations highlight the differences, debunking carbon fouling fears and showing why the AR remains cleaner and more accurate than many assume.
Yet despite its proven battlefield dominance – lightweight construction, minimal recoil, sub-MOA potential, and unmatched longevity – modern rifle designs largely abandon Stoner's genius in favor of short-stroke or long-stroke external pistons. Examine examples: NATO allies adopting enhanced AR variants (like New Zealand's LMT), rare hybrids like South Korea's K1/K2 evolution, or niche options like the CMMG Descent for suppressed use. Discuss potential reasons: misinformation spreading the "DI" label, perceived advantages in full-auto control or high-pressure rounds, marketing hype around pistons, or simple trend-following over innovation.
This educational breakdown celebrates the AR platform's engineering brilliance while questioning why the firearms industry overlooks a system that's battle-tested, efficient, and often superior in parts count and weight. Perfect for gun enthusiasts, AR owners, military history buffs, and anyone curious about rifle mechanics, misconceptions in the 2A community, and the evolution of modern battle rifles.
If you're tired of hearing the wrong terminology or wondering why piston rifles dominate new designs despite the AR's track record, this video sets the record straight with facts, patents, and real-world comparisons.
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