Darkgun Homepage
AR 15 History
AR 15 Ammunition
AR 15 Barrel Lengths
AR 15 Compensators
AR 15 Manufacturers
AR 15 Sighting Systems
AR 15 Stocks
AR 15 Upper Halfs
Sniper-Style AR 15 Rifles
Legality of AR 15 Rifles

AR 15 Barrel Lengths

AR 15 barrels come in many shapes and sizes, all of which serve different purposes. The standard length for an AR 15 barrel is 16”. In many states in the U.S., barrels of AR 15s are required to be at least this length. The 16” barrel is highly preferred because it provides accuracy and power while remaining short enough to easily maneuver in small spaces.AR 15 Compensated Barrel

Many shooters prefer the M4-style barrel, which is only 14.5” in length. Most of these barrels must have a permanently attached birdcage, or flash suppressor, which brings the total length back to 16”. The main issue with reference to the M4-style AR 15 barrels is accuracy; because the barrel is shorter, there is a certain amount of precision that is sacrificed. When choosing which barrel is right for you, consider your experience level as well as what you’ll be using the AR 15 for. If you don’t need long-range accuracy, but would like a lighter weight and more discreet firing, then the M4-style could be for you.

AR 15 barrels also come in longer lengths, including 20”or more. While these AR 15 barrels provide greater accuracy and precision at long ranges, they are not as easy to maneuver, and are also heavier than traditional 16” barrels or the M4-style barrels. Again, your choice of AR 15 barrel should reflect how you will use your rifle. Longer barrels are often used on sniper-style rifles, and many times are complemented by bipods to provide even greater accuracy.

Regardless of the barrel length you choose, make sure that the AR 15 you select is from a reputable manufacturer to ensure long-lasting performance and safety.