Gas is tapped from the barrel as the bullet moves past a gas port located above the rifle's front sight base.

The gas port is located just forward of the chamber where the gases are hotter and cleaner.

Mr. White finished the job and pulled the nozzle from the truck's gas port.

The gas port was closed, so I knew Eric had finished refueling before something had happened to him.

Then he remembered the ship had gas ports in the bottom.

It has a gas port, petrochemical facilities and desalination plant.

The gas port is opened from 0.062 to 0.070 in (0.16 to 0.18 mm).

H3 may be needed for an extreme case, or when the gas port is eroded but the barrel still groups.

The gas port has been opened to 0.070 in (0.18 mm).

This sleeve opened a series of gas ports which bled off exhaust gases and so determined the range.