This video explores the optimal AR-15 barrel lengths for various roles, featuring insights from Neil McLean. Shorter barrels like 10.5" are ideal for CQB, while 14.5" and 11.5" offer versatility. The 12.5" is highlighted as a performance sweet spot, and 13.7"/13.9" barrels achieve 16" compliance with muzzle devices. Longer 18" and 20" barrels are discussed for distance, though the 5.56 caliber's suitability is questioned for extreme ranges.
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