This video is a product spotlight on Rosco AR-15 barrels, presented by Brownells Gun Tech™ Caleb Savant. The video highlights Rosco Manufacturing's research-driven approach to optimizing barrel specifications, such as gas port diameter, gas system length, and rifling twist rate, for different barrel lengths. This ensures maximum accuracy and soft recoil without compromising reliability. The description emphasizes Rosco's OEM manufacturing history for high-end AR-15 makers and their commitment to quality. It mentions material options like 416R stainless steel with black Nitride finish and 4150 chrome-moly alloy, as well as unique features like dimpling for gas blocks and proprietary gas tubes that come with the barrel. The video also notes Rosco's "Proudly made in the USA" motto.
This 'Smyth Busters' episode tackles the persistent myth of 5.56 NATO bullets tumbling in flight. Hosts Steve and Caleb from Brownells Gun Techs investigate whether this phenomenon, often cited as a reason for the cartridge's lethality, is real. They explain how early M16s with slower 1-12" twist barrels might have contributed to the misconception, with bullets potentially tumbling after impact rather than in the air. The video clarifies that accurate flight requires stability and that heavier bullets (62 and 77 grain) might yaw but don't tumble end-over-end. The discussion highlights the importance of modern, faster twist rates (1-7" and 1-8") for optimal accuracy with heavier projectiles in AR-15 platforms. Ultimately, the myth of 5.56 NATO bullets tumbling in flight is definitively busted.
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