A gas tube channels gas from the barrel’s gas port back to the bolt carrier group to cycle semi-automatic AR rifles. Lengths include pistol, carbine, mid, and rifle to match the barrel’s gas system. Works with: AR-15/AR-10 barrels (with gas port), gas blocks (low-profile or FSB), upper receivers, bolt carrier groups, and handguards. Proper length and alignment are critical for reliability, ejection pattern, and recoil impulse. Ideal for new builds, replacements, or caliber conversions.
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