Avenger Mobile Reserve on the ready at Kunsan Published Aug. 7, 2006 SAN ANTONIO (AFPN) -- Armored personnel carriers, up-armored Humvees, 50 mm machine guns and Mark-19s are a few of the heavy weapons used by a security forces flight to bolster defense at Kunsan Air Base, South Korea.Avenger Flight is only called out when the commander needs it. Most of the sectors on base have their own security forces units assigned, but the mobile reserve flight adds a greater firepower aimed at neutralizing threats.For more on what Avenger Flight brings to the fight at Kunsan, see the related video.