DEFCON Underground MFG

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10531 E US Hwy 40
Independence, Missouri 64055

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Underground Bunker Defensive Upgrades

AR500 Steel Plate

DEFCON uses AR500 Steel plate in 3/8” and 1/2’’ in all of its Underground Bunkers – Bomb Shelter blast doors. AR500 steel is an abrasion resistant steel plate used in high-wear applications, like mining or material handling. This steel is heat treated to exhibit through-hardening, improved forming, and welding capabilities. AR500 steel possesses excellent resistance to slide wear, rub wear and heavy wear. It can also withstand high impact stresses, even at extremely low temperatures. With its ability to withstand high impact stress, AR500 has been widely popular for its uses in body armor and ballistic plates. AR500 steel can stop many threats, including, but not limited to:

  • Pistol Calibers: .22LR, 9mm, .40 S&W, 45 ACP, 10mm, .357 Magnum, and .44 Magnum
  • Rifle Calibers: .223/5.56 (M855 62g Penetrators), 7.62×39, 7.62×51 (M80 Ball), .308 Winchester, 12 Gauge 3” Magnum 00 Buck, and 12 Gauge 1oz Slugs
  • Platforms include a variety of Handguns, Pistol Caliber Rifles, and Rifles to obtain a wide variety of velocities for a given round.

DEFCON also offers many more Defensive Upgrades 

For a Free Quote, call us at (816) 438-7171 or

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DEFCON Underground MFG

Cory Hubbard,

10531 E US Hwy 40

Independence, Missouri 64055


DEFCON Underground Mfg, crafts underground bunkers, bomb shelters and emergency shelters that are built with high quality plate steel and re-enforced structural metals. Your entire underground bomb shelter, with renowned durability, is extremely rigid and strong, unlike shelters from many of our competitors. As extreme pressures are applied; the steel construction frame used in our engineering adds tremendous strength to the bunker while distributing weight and pressure across the entire are. We build them without structural weak spots and these underground bunkers will not collapse under weight or unexpected shifts in the surrounding areas.