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  • STEGO® Modular Armor System
  • STEGO® Modular Armor System
  • STEGO® Modular Armor System
  • STEGO® Modular Armor System

STEGO® Modular Armor System

The building blocks of protection.
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Created in collaboration with the U.S. Armed Forces, the STEGO® Modular Armor System was designed to provide ballistic protection in constantly changing threat environments. STEGO® enables security team members or fielded troops to create Tactical Operations Centers (TOC), safe houses, bunkers and other positions that are protected against rifle rounds up to NIJ Level IV 30-06 AP.

STEGO® is a self-supporting, modular armor system built using a variety of blocks which are connected using attached detent pins. This design enables the user to assemble the desired configuration in minutes.


A standard STEGO® kit consists of 60 blocks and can be transported by truck or trailer. Each kit contains four types of blocks to maximize the system’s capabilities and versatility in the field.

Base block: Provides structural support and a solid foundation for uneven surfaces, as well as immediate armored protection for personnel.

Armor block: These blocks offer full armor protection and are used most frequently.

Weapons port block: Opens to allow the user to engage outside threats and transfer items through the armor system.

Window block: Features user-replaceable ballistic glass to allow the user to identify approaching threats and opens to transfer larger items.

If an application warrants, window, weapons port, and armor blocks may be used separately away from other kit components.


With an understanding that the needs of troops and security personnel vary across environments and applications, the STEGO® Modular Armor System can be assembled in a variety of physical configurations. Standard assemblies are 12 blocks wide by 5 blocks high, and blocks can be configured at angles ranging from 90 to 180 degrees.

Semi-circular formation: Used for optimal visibility in multiple directions.

90-degree formation: Provides protection from threats in two directions.

3-sided formation: Protects from threats in three directions.

U-shaped formation: Commonly used as a guardhouse at an entry control point to a base or along a road. This configuration is available with an optional weather-resistant or ballistic canopy.

Government Purchasing Assistance

Defenshield STEGO Modular Armor Systems are available through the GSA Schedule for federal agencies and to state, local, and municipal law enforcement under the Justice Department 1122 program. All Defenshield products are also listed on the DHS Authorized Equipment List. Funding is available through the DHS Homeland Security Grant Program (HSGP). Contract #GS-07F-5660P

Call or contact us via the form below to speak with the experts at Defenshield.


NIJ Level IV 30-06 AP

National Institute of Justice (NIJ) 0108.01 Ballistic Level Breakdown

Rating Ammunition Weight
Number of
Level I .22 long rifle high velocity lead 40 2.6 320 +/- 12 1050 +/- 40 5
Level I .38 special round nose lead 158 10.2 259 +/- 12 850 +/- 50 5
Level IIA .357 mag. jacketed soft poin 158 10.2 381 +/- 15 1250 +/- 50 5
Level IIA 9mm full metal jacket 124 8.0 322 +/- 12 1090 +/- 40 5
Level II .357 mag. jacketed soft poin 158 10.2 425 +/- 15 1395 +/- 40 5
Level II 9mm full metal jacket 124 8.0 358 +/- 12 1175 +/- 40 5
Level IIIA .44 mag. lead semi-wadcutter gas checked 240 15.55 426 +/- 15 1400 +/- 50 5
Level IIIA 9mm full metal jacket 124 8.0 426 +/- 15 1400 +/- 50 5
Level III 7.62mm (.308 Winchester) full metal jacket 150 9.7 838 +/- 15 2750 +/- 50 5
Level IV .30-06 armor piercing 166 10.8 868 +/- 15 2850 +/- 50 1

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The following items are some basic questions to ask when preparing your Defenshield order.

What is the nature of the threat – small arms, rifle rounds, armor piercing, IED blast?

Will the unit be used indoors or outdoors?

Will the unit be used for riot control or hostage negotiations?

Do you require conspicuous deterrence or camouflage?

Will the unit need to match the aesthetics of it’s surroundings – wood or stone finishes?

Will you need traffic control signage, unit logos or law enforcement badges displayed on the unit?

What is the size of the space where the unit will be used?

Will the unit need to fit through doorways, into elevators?

What are you protecting – people, objects?

(For maximum blast mitigation, units must be secured or lagged.)

What surface are you using the unit on – gravel, dirt road, finished concrete, wood floor?

Will the unit be frequently relocated?

Will you be transporting the unit over long distances or within a few feet?