NIJ 0101.06 Armour Protection Levels

Understanding NIJ 0101.06 Armour Protection Levels
This information is taken from  www.justnet.org
EXISTING LEVELS OF PROTECTION
WHAT ARE NIJ COMPLIANT ARMOURS TESTED AGAINST?
Level IIA
Tested to stop 9mm and .40 S&W ammunition fired from short barrel handguns. No rifle ammunition protection.
Level II
Tested to stop 9mm and .357 Magnum ammunition fired from short barrel handguns. No rifle ammunition protection.
Level IIIA
Tested to stop .357 SIG and .44 Magnum ammunition fired from longer barrel handguns. No rife ammunition protection.
Level III
Tested to stop 7.62mm FMJ lead core rifle ammunition.
Level IV
Tested to stop .30cal steel core armour piercing rife ammunition.

The above is a snapshot of select threat projectiles and classifications of armours related to these general threats. Refer to NIJ standard 0101.06 for further details.
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