AR15 Barrels

Most shooters call the barrel the heart of the AR15. Pick it first and build around it.

What to look for

• Length: 16 inches is the most common. See barrel length
• Twist rate: 1:7 or 1:8 handles most bullet weights
• Material: chrome-moly or stainless
• Finish: chrome lined or nitrided for long life
• Profile: lighter pencil, standard government, or heavy

Gas system

• Carbine: short and snappy
• Mid-length: softer shooting on 14.5–16 inch barrels
• Rifle length: 18–20 inch barrels

Tip: chamber marked 5.56 safely shoots .223. Not always the other way around.

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