This video from Louisiana Firearms, featuring Gabe, explores the impact of AR-15 barrel length on bullet velocity and trajectory. It highlights how shorter barrels (e.g., 10.3 inches) are optimal for Close Quarters Battle (CQB) and confined spaces, while longer barrels (e.g., 20 inches) maximize velocity for 5.56 rounds. The discussion also covers how Bullet Drop Compensator (BDC) optics are calibrated based on these factors and the environment.
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