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Mfg Item #: FGAV10120
VooDoo Gas Tube - VDI gas tubes are compatible with mil-spec and non mil-spec upper receivers. This gas tube is machined to exceed all MIL TDP specifications and is enhanced using a proprietary LifeCoat treatment. This is a process that offers superior: - Durability - Lubricity - Corrosion Resistance - Requires a barrel with a piston length gas system - meaures approximately 4.846 from barrel extension to shoulder.