| NIJ LEVEL 1 / NIJ LEVEL I |
Bullet resistance
| Weight Grains
| Maximum velocity m/s (ft/s)
| Energy J | | .38 Special RN Lead | 158 | 274 (900) | 384 | | .22 LRHV Lead | 40 | 335 (1100) | 145 | | 12 bore 3“ Mag 00 Buck | 555 | 370 (1215) | 2462 |
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| NIJ LEVEL 2 / NIJ LEVEL II |
NIJ LEVEL
| Billet resistance
| Weight Grains
| Maximum veloity m/s (ft/s) | Energy J
| | II-A | 9 mm FMJ* | 124 | 347 (1140) | 484 | | | .357 Magnum JSP Rem | 158 | 396 (1300) | 803 | | II | 9 mm FMJ Rem* | 124 | 373 (1225) | 559 | | | .357 Magnum JSP Rem | 158 | 440 (1445) | 991 | | | .44 Magnum SWC-GC | 240 | 364 (1200) | 1030 | | | 9 mm GECO DM11A1B2 | 123 | 350 (1150) | 488 |
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| NIJ LEVEL 3 / NIJ LEVEL III |
| | Bullet resistance
| Weight Grains
| Maximum veloity m/s (ft/s)
| Energy J | | IIIA | 9 mm FMJ Rem* | 124 | 441 (1450) 781 | 781 | | | .44 Magnum SWC-GC | 240 | 441 (1450) 781 | 1512 | | | 9 mm GECO DM11A1B2 | 123 | 410 (1345) | 670 | | | 9 mm Norma 19022 | 116 | 441 (1450) 781 | 731 | | | 9 mm Lapua | 123 | 410 (1345) | 670 | | III | 5.45 mm Mild Steel Core | 54 | 930 (3050) | 1510 | | | 5.56 M193 | 55 | 1000 (3280) | 1780 | | | 5.56 mm SS109 | 62 | 1000 (3280) | 2005 | | | 7.62 x 39 mm Mild Steel
Core | 123 | 740 (2425) | 2180 | | | 7.62 x 51 NATO Ball | 150 | 853 (2800) | 3535 | | | 7.62 x 51 mm (308 Win) Ball | 150 | 853 (2800) | 3535 | | | 7.62 x 51 mm (DAG AP) | 150 | 835 (2740) | 3390 |
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| NIJ LEVEL 4 / NIJ LEVEL IV |
Bullet resistance
| Weight Grains
| Maximum velocity m/s (ft/s)
| Energy J
| 30 - 06 AP
| 166 | 868 (2850)
| 4195 |
|
| Nonwoven fabric |
A textile structure held together by interlocking of fibers in a random web, accomplished by mechanical, chemical, thermal or solvent means. Generally, crimped fibers that range in length from 0.75 to 4.5 inches are used.
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