This video from Classic Firearms provides an expert-level comparison of muzzle brakes and flash hiders, featuring insights from instructors Clint and Kaydi. It details the gas dynamics and design differences, demonstrating their effects on recoil, muzzle rise, and flash signature with various firearms like the FN 15 M4 and Daniel Defense MK12. The guide emphasizes choosing the right device based on application, from low-light shooting to rapid follow-up shots.
This video tests how 5.56mm bullet velocity changes with barrel length, using PMC X-TAC 55-grain ammo. Velocities ranged from 2,183 ft/s from a 7.5-inch barrel to 3,052 ft/s from a 20-inch barrel. Shorter barrels like 12.5 inches offer a good balance for AR pistols, while longer barrels like 18-20 inches approach the manufacturer's rated velocity.
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