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NIJ Standards
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N.I.J. Ballistic Standards 0101.04 for Ballistic Protection | |||
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| N.I.J. THREAT LEVEL | ROUNDS (+/- 50) | 0101.04 VELOCITIES | |
| Level IIA | 9mm 124 gr. FMJ RN .40 Caliber 180 gr. FMJ |
1120 f/s 1055 f/s |
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| Level II | 9mm 124 gr. FMJ RN .357 Magnum 158 gr. JSP |
1205 f/s 1430 f/s |
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| Level IIIA | 9mm 124 gr. FMJ RN .44 Magnum 240 gr. JHP |
1430 f/s 1430 f/s |
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| Level III | .762 mm NATO 148 gr. (.308 Caliber) FMJ |
2780 f/s | |
| Level IV | 30.06 166 gr. (.30 Caliber) M2AP Armor Piercing |
2880 f/s | |
All 0101.04 Certified Level IIAs continue to protect against 4" .357 Magnums, as evidenced by a minimum .357 Magnum 158 gr. JSP V-50 Ballistic Limit of 1400 f/s. This policy adoption was made necessary by N.I.J.'s removal of the .357 Magnum 158 gr. JSP bullet at Level IIA, replacing it with the less stringent .40 S&W 180 gr. FMJ.
Mechanics of Blunt TraumaWhen body armor defeats an impacting bullet through expansion and deformation, kinetic energy is transferred to the body. The resulting damage to tissue is called blunt trauma. To comply with the N.I.J. Body Armor Standard, this deformation cannot exceed 44 millimeters in Roma Plastina #1 Clay.
Thickness is measured in inches.
Areal Density is measured in pounds-per-square-foot (not including the carrier) and is the most accurate method for comparing vests since vest sizes and their accompanying weights differ.
N.I.J. Spike LevelsThe National Institute of Justice rates body armor on resistance to hand-delivered stab threats.
N.I.J. Standard 0115.00 For Spike Protection | |||
|---|---|---|---|
| LEVEL | SPIKE CLASS 1 | SPIKE CLASS 2 | SPIKE CLASS 3 |
| Strike Energy | "EI" = 25 joules (17.7 ft. lbs.) |
"EI" = 33 joules (24.3 ft. lbs.) |
"EI" = 43 joules (31.7 ft. lbs.) |
| Overstrike Energy | "E2" = 36 joules (26.6 ft. lbs.) |
"E2" = 50 joules (36.9 ft. lbs.) |
"E2" = 65 joules (47.9 ft. lbs.) |
To help you select your body armor, we've provided the appropriate N.I.J. Threat or Spike levels for each of our body armor products.
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