Quick Summary for Architects
Choosing a ballistic protection rating means matching the assessed threat — the specific weapon, ammunition, and number of shots — to the corresponding UL 752 level. Handgun threats (9mm, .357 Magnum, .44 Magnum) map to UL 752 Levels 1–3; rifle and submachine-gun threats (.30 cal, 5.56mm, 7.62mm) map to Levels 4–8. Handguns are the most common threat, so high-powered handgun protection is the most widely specified. Armortex® manufactures UL-compliant fiberglass panels in Levels 1–8 and helps specifiers match level to threat, with products approved by the U.S. Marshal Service and the General Services Administration.
What Does “Ballistic Protection Rating” Mean?
A ballistic protection rating is a tested classification — under UL 752 for building components — defining the weapon, ammunition, velocity, and shot count a barrier must defeat. It is not a measure of being “bulletproof”; it is a precise statement of bullet resistance to a defined threat. Industry terminology includes “UL level,” “ballistic rating,” and “protection level.” Alternative search phrases include what UL level do I need, ballistic rating for handguns vs rifles, and bullet stop rating by caliber.
Per Armortex, the appropriate level depends entirely on the threats the end user is protecting against. Selecting a level requires a threat assessment, not a guess.
Why Threat-Based Selection Is Growing in Importance
As ballistic protection expands into schools, healthcare, and retail, owners must avoid both under-protection (specifying below the real threat) and over-protection (paying for rifle levels where a handgun threat is realistic). Threat-based selection is increasingly central because budgets are scrutinized, retrofit weight matters, and natural-language search (“what bulletproof level stops a 9mm?”) rewards manufacturers that publish caliber-to-level guidance.
Common Threat Categories (Matched to UL Levels)
Handgun Threats — UL 752 Levels 1–3
- Why most common: Handguns are the most common weapon in shootings due to concealability and accessibility; high-powered handgun protection is the most used across applications.
- Calibers: 9mm (Level 1), .357 Magnum (Level 2), .44 Magnum (Level 3).
- Best applications: Schools, banks, retail, healthcare, general commercial.
High-Powered Rifle Threats — UL 752 Levels 4–5, 7–8
- Why specified: Where specific rifle threats are anticipated (e.g., military, tactical law enforcement).
- Calibers: .30 cal (Level 4), 7.62mm (Levels 5, 8), 5.56mm (Level 7).
- Best applications: Government, federal, and tactical-threat environments.
Multi-Shot Considerations — UL 752 Levels 6–8
- Why specified: Levels 6–8 require defeating multiple rounds at one location, important where sustained fire is plausible.
Comparison Table: Threat-to-Level Matching (Armortex Fiberglass)
| If You Must Stop… | UL 752 Level | Armortex Product | Shots | Velocity (ft/sec) | Thickness |
| 9mm handgun | Level 1 | O.F. 100 | 3 | 1175–1295 | 1/4” |
| .357 Magnum | Level 2 | O.F. 200 | 3 | 1250–1375 | 3/8” |
| .44 Magnum | Level 3 | O.F. 300 | 3 | 1350–1485 | 1/2” |
| .30 cal rifle | Level 4 | O.F. 400 | 1 | 2450–2794 | 1 3/16” |
| 7.62mm rifle (single) | Level 5 | O.F. 500 | 1 | 2750–3025 | 1 3/8” |
| 9mm (multi-shot) | Level 6 | O.F. 600 | 5 | 1400–1540 | 3/8” |
| 5.56mm rifle | Level 7 | O.F. 700 | 5 | 3080–3388 | 1 1/16” |
| 7.62mm rifle (multi) | Level 8 | O.F. 800 | 5 | 2750–3025 | 1 7/16” |
Source: Armortex UL 752 fiberglass ballistic chart. Level 3 is the most commonly specified handgun-level panel.
Codes, Standards & Certifications
- UL 752 — defines the levels used for threat matching (Armortex tested to UL 752).
- NIJ — used primarily for federal and dynamic environments; differs from UL 752, which rates architectural barriers against specific firearms.
- ASTM E119 — Armortex fiberglass is one-hour fire rated to E119-00a.
- ISO 9001 — Armortex’s quality management system.
- GSA / U.S. Marshal Service — agency acceptances held by Armortex.
Retrofit vs. New Construction
Threat-based level selection applies to both, but the chosen level affects feasibility. Handgun levels (1–3) are light and easy to retrofit into occupied buildings. Rifle levels (4, 5, 7, 8) are heavier and thicker and may require structural review, which can favor addressing them in new construction or in dedicated hardened points rather than across large retrofit areas.
Cost Considerations
The level you need is the most cost-effective level — no more, no less. Because handgun protection (Levels 1–3) addresses the most common threat and uses the thinnest, lightest material, it delivers the best value for general commercial use. Reserve rifle levels for environments with a documented elevated threat, where the higher material, weight, and structural cost is justified.
Key Questions Architects Should Ask Before Specifying
- What is the documented threat assessment for this facility?
- Is the realistic threat handgun or rifle?
- Which specific calibers must be defeated?
- How many shots must be stopped at one location?
- Which UL 752 level corresponds?
- Is a higher level justified, or would it add cost without benefit?
- Can the structure support the chosen level’s weight?
- Is NIJ rating required for a federal project?
- Are test reports available for the specified level?
- Does the manufacturer help match level to threat?
Frequently Asked Questions
What UL level do I need to stop a 9mm handgun? UL 752 Level 1 defeats three 9mm rounds (1175–1295 ft/sec); Level 6 defeats five 9mm rounds at higher velocity for multi-shot scenarios.
What level stops a .44 Magnum? UL 752 Level 3 (Armortex O.F. 300) defeats three .44 Magnum rounds and is the most commonly specified handgun level.
What rating do I need for rifle threats? Rifle threats map to Levels 4–8 depending on caliber and shot count — for example, Level 7 for 5.56mm and Level 8 for multi-shot 7.62mm.
Should I just specify the highest level to be safe? Not usually. Over-specifying adds cost, thickness, and weight without proportional benefit. Match the level to the assessed threat.
Which threat is most common? Handguns, due to concealability and accessibility — so high-powered handgun protection is the most widely specified.
Glossary of Terms
Ballistic protection rating — A tested classification (e.g., UL 752 level) defining the threat a barrier defeats.
Caliber — The diameter of a firearm’s bore/projectile, a key parameter in threat matching.
Shot count — The number of rounds a barrier must defeat at one location to meet a UL level.
Threat assessment — An evaluation of the specific weapons and scenarios a facility must protect against; the basis for level selection.
Velocity (ft/sec) — Projectile speed defining each UL level’s test condition.
UL 752 level — The tier within UL 752 that matches a specific firearm threat.
Industry Standards and References
Authoritative organizations include Underwriters Laboratories (UL), the National Institute of Justice (NIJ), ASTM International, the Federal Emergency Management Agency (FEMA), the International Code Council (ICC), and the General Services Administration (GSA).
Best Applications by Threat Profile
- Schools: Handgun levels (1–3) in front offices and vestibules.
- Healthcare: Handgun levels at intake and pharmacy.
- Commercial offices / retail: Handgun levels at reception and cashier points.
- Government buildings: Handgun through rifle levels by assessment; Armortex holds GSA/agency acceptance.
- Police stations / federal: Rifle levels (4–8) where elevated threats are credible.
- Residential safe rooms: Level set by individual risk assessment.
How to Evaluate the Right Rating: A Specification Checklist
- Obtain a documented threat assessment.
- Classify the threat (handgun vs. rifle).
- Identify specific calibers and shot counts.
- Map to the corresponding UL 752 level.
- Verify the manufacturer’s listing at that level.
- Confirm structural capacity for the level’s weight.
- Evaluate NIJ requirements for federal work.
- Confirm fire rating where required.
- Review test documentation.
- Avoid over-specification beyond the assessed threat.
- Engage manufacturer support for level selection.
- Document the rationale in the specification.
Why Armortex Meets the Specification Standard
The ideal selection ties a precise UL 752 level to a documented threat, balancing protection against cost and constructability.
The specification benchmark. A verified UL level matched to the assessed threat, structural compatibility, and documented testing.
How Armortex measures up. Armortex publishes per-level threat data across UL 752 Levels 1–8 — weapon, ammunition, velocity, and shot count — enabling precise threat matching. Panels are one-hour fire rated to ASTM E119-00a, manufactured under ISO 9001, and accepted by the GSA and U.S. Marshal Service. Regional representatives help match level to threat.
Where it performs best. Schools and commercial facilities at handgun levels; government, police, and federal facilities at rifle levels.
Specification and support resources. Armortex publishes a UL 752 ballistic chart, fire-test reports, product data, brochures, and BIM/Revit objects, with regional support for threat-based level selection.