Level IV body armor is a rifle level that law enforcement, military and security buyers meet on plate labels and product pages, and that civilians ask about too. Understanding what Level IV body armor was tested to stop, and what it was not, is the starting point for any decision about a plate.
This article sets out what the standard says, how it relates to the current NIJ levels, and what to check on the exact model.
Understanding Level IV body armor
Level IV is the highest rifle level of NIJ Standard 0101.06. Its test round is an armor-piercing rifle round: the .30 caliber M2 AP bullet, 166 gr, at 2,880 ft/s. The rifle rounds in NIJ's current threat specification are tested at 2,400 to 3,250 ft/s, against 1,305 to 1,470 ft/s for the handgun rounds.
NIJ stopped accepting new 0101.06 models for testing on 5 January 2024. Listed models stay on the 0101.06 Compliant Products List (CPL), and NIJ anticipates maintaining that list through at least the end of calendar year 2029. A Level IV listing is not expired.
Under NIJ 0101.07, the levels are defined in NIJ 0123.00, and the nearest level is RF3, whose test threat is the .30-06 M2 AP, 165.7 gr, at 2,880 ft/s. NIJ 0123.00 maps some old levels to new ones (RF3 replaces Level IV), but a model's listing does not carry over: a model listed at Level IV under 0101.06 has not been listed at RF3 unless it appears on the 0101.07 list.
Level IV armor is usually a hard plate made from ceramic, steel or polyethylene, alone or in combination, worn in a carrier. The material affects weight, handling and cost; the level is what the test recorded.
What Level IV body armor can stop
The Level IV test names one round, the .30 caliber M2 AP, also designated .30-06 M2 AP in 0123.00 (sometimes written 7.62x63mm). A Level IV listing says the model passed that test, at that velocity, with the standard's shot pattern.
It does not say more than that. The test does not name the 7.62x51mm M80, the 5.56mm rounds or any handgun round, and a listing does not show the model was tested against them. If those rounds are in your threat assessment, ask the maker for the test report for each one, from a named lab.
NIJ's Body Armor User Guide says no body armor is bulletproof, and that armor can be penetrated by an impact too close to an edge or to another impact.
The science behind Level IV protection
How a plate defeats a round depends on its material and construction, and we found no NIJ or CJTTEC source that describes or ranks the mechanism by material (checked 1 October 2026). What the sources do say:
- Ceramic is among the materials the National Research Council credits with reducing the weight of armor for personnel. CJTTEC advises against dropping ceramic plates on hard surfaces, which can cause breaks or cracks that can affect performance.
- Steel is a dense metal. A 2009 study of steel-panel body armor (Egorov et al.) reports that fragments from a bullet striking hard steel can ricochet and injure the wearer's arms, face or neck, and it tests layers in front of the steel to contain them.
- Polyethylene (UHMWPE) is among the polymer fibers the National Research Council credits with reducing armor weight, and NIST has studied how heat in storage and use can reduce the strength of UHMWPE fibers.
Comparing Level IV materials: ceramic, steel, polyethylene
| Question | Where the answer lives |
|---|---|
| Which level, under which standard | The model's CPL listing, with the date you read it |
| Weight and thickness | The maker's stated figures for that exact model and size |
| Fragment layer (steel) | The maker's test report for that exact model |
| Storage and heat limits | The maker's care instructions |
| Price | Quotes for the exact model |
We do not rank materials on weight, cost, durability or multi-hit. For more, see materials used in armor plates explained.
Multi-hit capabilities of Level IV armor
A level is earned against a defined shot pattern: named rounds, a set number of shots and set placement. Real-world multi-hit capacity beyond that pattern is not established by the test. We found no NIJ or CJTTEC source that ranks ceramic, steel or polyethylene for multi-hit (checked 1 October 2026).
Our advice: if a seller says a plate stops a number of hits, ask whether that refers to the standard's pattern or to its own testing, and ask for the test report for that exact model. CJTTEC advises replacing armor struck by a bullet immediately.
Choosing the right plate carrier for Level IV armor
A plate carrier holds the plates, and in our view the right one fits well, holds the plates securely and lets the wearer move and reach other gear.
When deciding on a carrier, consider adjustability, weight distribution and attachment systems such as MOLLE straps. Check that the plate fits the carrier's pocket as the maker specifies.
If a plate was tested in conjunction with (ICW) a specific soft armor model, CJTTEC says it should be used only with the soft armor it was tested with. The combination, not the plate alone, is what was tested.
For more, see our post on exploring different types of plate carriers.
FAQs about Level IV body armor
Can civilians own Level IV body armor? Federal law, 18 U.S.C. § 931, bars anyone convicted of a felony that is a crime of violence from purchasing, owning or possessing body armor, and its definition of body armor does not mention a protection level. States can add rules: New York limits the sale and purchase of body armor to people in eligible professions, and Texas makes possession by anyone convicted of a felony a third degree felony. This is orientation, not legal advice. For more, read can civilians own Level IV body armor.
Is Level IV body armor concealable? Concealability depends on the plate's size and thickness and on the carrier, so check the maker's stated dimensions for the exact model.
Are Level IV plates stab-proof? A ballistic listing does not cover stab threats. Stab-resistant armor is tested to NIJ Standard 0115.00 and has its own Compliant Products List. If edged weapons are in your threat assessment, look for a model listed for stab resistance.
Conclusion
Level IV is defined by one armor-piercing round at a set velocity under NIJ 0101.06, and RF3 is its nearest level under 0101.07. A listing tells you the model passed that test; it does not tell you about other rounds or more hits.
Check the exact model on the list for the standard it claims, with the date you read its status, or, for a plate outside the NIJ program, the standard and lab report behind the claim. Then weigh weight, material and the carrier for the person who will wear it.
Sources
- NIJ, Ballistic Resistance of Body Armor, NIJ Standard-0101.06 (PDF) (read 2026-09-29)
- NIJ, Specification for NIJ Ballistic Protection Levels and Associated Test Threats, NIJ Standard 0123.00 (read 2026-09-29)
- NIJ, NIJ Standard 0123.00 (PDF) (read 2026-09-29)
- NIJ, NIJ Standard 0123.00, Addendum 2 (read 2026-09-29)
- NIJ, Ballistic Resistance of Body Armor, NIJ Standard 0101.07 (read 2026-09-29)
- NIJ, Compliant Products List: Ballistic Resistant Body Armor (read 2026-09-29)
- CJTTEC, NIJ Standard 0101.07 Information (read 2026-09-25)
- CJTTEC, New Ballistic-Resistant Body Armor Standard Published (read 2026-09-29)
- CJTTEC, Body Armor FAQs (read 2026-09-25)
- CJTTEC, Body Armor Care and Replacement (read 2026-09-30)
- CJTTEC, Compliant Product List: Stab Armor (read 2026-09-29)
- NIJ, Body Armor User Guide (read 2026-09-29)
- National Research Council, Opportunities in Protection Materials Science and Technology for Future Army Applications (2011) (read 2026-09-30)
- Tsinas et al. (NIST), Effects of Thermal Aging on Molar Mass of Ultra-High Molar Mass Polyethylene Fibers, Polymers (2022) (PMC) (read 2026-09-30)
- Egorov et al., Investigation of Anti-Ricochet Properties of Body Armor with Steel Armor Panels, Techniczne Wyroby Wlokiennicze (2009) (read 2026-09-30)
- 18 U.S.C. § 931, Prohibition on purchase, ownership, or possession of body armor by violent felons (read 2026-09-25)
- 18 U.S.C. § 921(a)(35), definition of body armor (read 2026-09-25)
- N.Y. General Business Law § 396-eee (read 2026-09-25)
- Tex. Penal Code § 46.041, Unlawful Possession of Metal or Body Armor by Felon (read 2026-09-26)