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 - measures approximately 4.846" from barrel extension to shoulder.

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