A 5.56 gas tube is a critical component in AR-15 rifles chambered in 5.56 NATO or .223 Remington, responsible for directing gas from the barrel’s gas port back to the bolt carrier group for semi-automatic cycling. It works with 5.56 barrels (with the correct gas port location), compatible gas blocks, upper receivers, and bolt carrier groups. Available in pistol, carbine, mid-length, or rifle sizes, the gas tube ensures reliable operation and cycling in 5.56/.223 AR-platform builds.
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