AR Barrels for Sale

AR Barrel Lengths

AR barrels are chosen based on the intended use of the platform. The further you want to shoot, the longer your AR barrel should be to maximize accuracy and velocity. Although they are sometimes found in shorter or longer lengths, here are the basics:

• 7.5”-10.5”: These barrel lengths are common for AR pistols. Also used on CQB setups, they are compact and easy to maneuver in confined spaces.
• 11.5”-14.5”: This is considered a long barrel for an AR pistol, and is often found on Short-Barrel Rifles (SBRs), which are an NFA item that requires a tax stamp and have additional legal requirements for ownership.
• 16”: The “civilian standard” because it is the minimum rifle length and does not require an NFA tax stamp or additional paperwork. It is a very popular rifle length as a good compromise between maneuverability and range.
• 18”-20”: Improved velocity and performance, but heavier and less maneuverable. These are considered more classic rifle barrel lengths.

AR Barrel Profiles

The barrel’s profile refers to the contour or thickness of the barrel. Like barrel length, your AR barrel’s profile should be selected based on your intended use.

Heavier barrels (HBAR) are able to withstand more heat and thus maintain better accuracy with constant firing. However, the additional weight can be cumbersome, and most shooters find that they don’t need a heavy barrel.

On the other end of the spectrum is the “pencil barrel”. This is a thin, light barrel that is easy to maneuver, but heats up faster. It’s an early M16-style barrel still used in some civilian rifles today.

In the medium range are the Government and M4 (standard military issue) barrels. These are more balanced and less prone to “barrel whip” than a pencil barrel. Although somewhat heavier in weight, the trade-off is considered acceptable by most shooters.

AR Barrel Materials

• 4150 Chrome Moly Vanadium (CMV): The most common barrel material, it is mil-spec and durable. It also comes in a 4140 variation that can be less expensive.
• 416R Stainless Steel: Another common material, it is more corrosion-resistant and has higher precision. However, it has a shorter life expectancy with heavy use.
• Carbon Fiber Wrapped: This is a barrel type that is very lightweight but expensive and found on high-end AR builds. The barrel itself is not made from carbon fiber, but usually stainless steel. The barrel is then wrapped in carbon fiber, as the name implies.

AR Barrel Treatments

• Chrome-Lined: The standard for military barrels, they are durable and corrosion-resistant.
• Melonite/Nitride: With an extremely hard surface finish, this treatment offers excellent corrosion and wear resistance.
• Phosphate: This is a basic and rugged exterior finish usually paired with a chrome-lined barrel.
• Bare Stainless: This is actually a lack of coating, used mainly for precision barrels.

This content is for informational purposes only and does not constitute legal advice. Always consult your local laws and regulations before purchasing firearms or firearm parts.