NIJ Threat Levels Explained

The National Institute of Justice threat level classification is how body armor is rated for what ballistic threats it can stop. The classification matters for three reasons:

1. Operational — are you actually protected against the threats in your environment?
2. BVP reimbursement — NIJ CPL listing is required for the grant
3. Procurement specs — agency bids call out specific NIJ levels

This guide walks through what each level means, what it stops, and how to pick the right level for your mission.

The two generations — 0101.06 vs 0101.07

NIJ Standard 0101.06 (2008) uses Roman-numeral levels: IIA, II, IIIA, III, IV. NIJ Standard 0101.07 (2023) renames to handgun (HG1, HG2) and rifle (RF1, RF2, RF3).

Both standards are valid during the transition. The CPL lists products under whichever standard they're certified to. Below, we cover both.

Handgun-rated (soft armor)

Level IIA (0101.06) → phasing out

Stops: 9mm (lower velocity), .40 S&W. Rarely specified for new procurements anymore. Backpack inserts, low-profile undergarment. Not sufficient against most duty handgun threats.

Level II (0101.06) → HG1 (0101.07)

Stops: 9mm (standard velocity up to ~1305 fps), .357 Magnum (JSP, ~1430 fps).

Use case: Common for patrol officers where primary threat is standard handguns. Thinner and more concealable than IIIA.

Level IIIA (0101.06) → HG2 (0101.07)

Stops: Everything Level II stops, plus .44 Magnum (SWC, ~1400 fps), .357 SIG (~1470 fps), higher-velocity 9mm (~1470 fps).

Use case: The modern duty standard for most LE agencies. Handles the vast majority of handgun threats officers face, including high-velocity 9mm and .44 Magnum.

Important: IIIA (soft armor) does NOT stop rifle rounds. To stop rifle threats, you need hard armor plates.

Rifle-rated (hard armor plates)

Level III (0101.06) → RF1 (0101.07)

Stops: 7.62×51mm NATO (M80 FMJ, up to ~2780 fps). Also commonly stops 5.56mm ball (M193), 7.62×39mm (AK).

Use case: Active-threat response, SWAT patrol, correctional tactical. Standalone plates (without soft armor backer) or ICW (in-conjunction-with soft armor).

What III does NOT stop: M855 "green tip" 5.56mm (mild penetrator), 7.62×51 with armor-piercing core, or higher-velocity rifle threats.

Level III+ (not an official NIJ level but widely marketed)

"Level III+" or "III-ICW-enhanced" products claim to stop additional threats beyond standard III — typically M855 green tip and some 7.62×51 variants. There is no official NIJ Level III+. These products may be certified at Level III with separate "Special Threat" testing, or they may be uncertified claims. Verify with the manufacturer and check CPL listing before specifying.

Level IV (0101.06) → RF3 (0101.07)

Stops: Everything Level III stops, PLUS .30-06 armor-piercing (M2 AP, ~2880 fps). This is the highest NIJ-certified threat level.

Use case: Elite tactical teams, nuclear security forces, ICBM security, Sentinel LGM-35A program, Sensitive Site Security. Overkill for most patrol.

Trade-off: Level IV plates are heavier (5-8 lbs vs 3-5 lbs for Level III ceramic). Extended wear affects mobility and fatigue.

RF2 (0101.07 only)

New in 0101.07: positioned between RF1 and RF3. Stops RF1 threats plus M855 green tip and additional rifle variants. Fills the gap where "Level III+" product used to sit.

Special cases

Stab-resistant armor

NIJ Standard 0115.01 covers edged-weapon / spike threats. Levels ED1, ED2, ED3. Primarily a corrections concern, though some urban LE agencies include stab resistance for shift-long wear environments.

Stab-resistant and ballistic-resistant are different materials and different certifications. "Combined threat" armor exists but is heavier than either specialized product alone.

Helmet ballistic (NIJ 0106.01)

HP1, HP2. HP2 stops higher-velocity handgun threats; neither stops rifle rounds. Rifle-rated helmets exist but are a separate product category.

Ballistic shields (NIJ 0108.01)

Typically Level IIIA (handgun) for uniformed patrol shields and Level III/IV for tactical team shields.

Which level does your agency need?

Patrol duty (~80% of LE procurement)

Default: Level IIIA (0101.06) / HG2 (0101.07) soft armor as concealable undershirt or external carrier. Reason: Covers handgun threats without the weight penalty of rifle plates. Officers wear it all shift.

Active-threat response

Add: Level III / RF1 rifle plates in an external plate carrier, separate from the daily soft armor. Deployment: In-car rapid-don, or patrol rifle + plate combo ready.

SWAT / tactical

Default: Level IV / RF3 plates plus IIIA soft backer. Reason: Multi-threat environments, extended contact, elite threat profiles.

Corrections

Default: Stab-resistant (NIJ 0115.01) primary; ballistic rating as secondary consideration depending on facility type and threat assessment.

Nuclear security force (AFGSC, DOE NNSA)

Default: Level IV / RF3 with reinforced shoulder and groin coverage. Long-duration wear optimized carriers.

How to read a vendor quote

A vendor quote should specify:

• NIJ standard: 0101.06 or 0101.07
• Threat level: IIA / II / IIIA / III / IV or HG1/HG2/RF1/RF2/RF3
• CPL number: the exact NIJ CPL listing
• Manufacturer model: must match CPL listing exactly
• Certification date: when CPL entry was added

If any of these are missing, ask. The missing piece is often the one that will trip up a BVP reimbursement.

Common mistakes

• Specifying "Level III" without specifying standalone vs ICW. These are different certifications. An ICW plate without the proper soft armor backer doesn't perform to its rated level.
• Treating "Level III+" as a real category. It's not. Verify actual CPL status.
• Assuming Level IV is universally better. Heavier plates fatigue officers over a long shift; the sample that wears the armor consistently is the only armor that protects.
• Mixing 0101.06 and 0101.07 in the same spec without noting which is acceptable. Write the spec as "0101.06 or 0101.07" if you want to accept either generation.

What Armor Systems covers

Our product directory tracks every NIJ CPL-listed product by manufacturer, model, level, and standard generation (0101.06 / 0101.07). When CPL status changes — delistings, new certifications, standard migrations — our agents flag affected products. BVP-eligibility filter surfaces only currently-listed products.

References

• NIJ Standard 0101.06 (2008)
• NIJ Standard 0101.07 (2023)
• NIJ Certified Products List — published regularly at nij.ojp.gov
• NIJ Standard 0115.01 — stab resistance (corrections)
• NIJ Standard 0106.01 — ballistic helmets
• NIJ Standard 0108.01 — ballistic shields