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guideApril 20, 20264 min read

Ballistic Helmets — The Complete ArmorOS Guide

NIJ 0106, ACH-GEN-II, MIL-DTL 44050, cut styles, pad systems, NVG mounting, and LE procurement — with every standard linked.

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Ballistic Helmets — The Complete ArmorOS Guide

Ballistic helmets are a distinct product category from body armor, with their own standards, manufacturers, and procurement dynamics. This pillar stitches the helmet cluster together.

What "ballistic helmet" means

A ballistic helmet is head protection designed to defeat small-arms threats (typically handgun rounds and fragmentation) while also providing blunt-impact mitigation. These are not skateboard helmets or tactical bump helmets — those lack ballistic rating. Every helmet surfaced on ArmorOS certifies against at least one ballistic standard.

Unlike body armor, helmets are not regulated at the state level for civilian purchase. Federal 18 USC § 931 also doesn't restrict civilian helmet purchase. The state compliance map is scoped to body armor only; helmets are governed by performance specs, not purchase restrictions.

The standards stack

  • NIJ 0106 — the primary US civil-sector helmet standard (1981, still referenced). Levels I, IIA, II against handgun threats only. Does not address rifle threats — those are covered by military specs.
  • MIL-DTL 44050 — the legacy PASGT detail specification; lineage for most fielded military helmets.
  • ACH-GEN-II — Advanced Combat Helmet Generation II, the US Army's performance spec for ACH and its derivatives. Defines V50 against 17-gr FSP and 9mm FMJ, backface deformation, and retention/pad performance. Many LE agencies write "meets ACH-GEN-II" into their specs even when NIJ 0106 is the formally referenced standard.
  • VPAM HVN 2009 — European helmet standard, export-relevant.
  • MIL-STD 662F — the V50 test methodology referenced by all military helmet specs.

See NIJ 0106 explainer and ACH-GEN-II explainer for threat-level detail and test protocols.

Cut styles — what the shape means

The helmet cut determines ear, neck, and mandible coverage. The four common cuts, from most-coverage to least:

  • Full-cut (PASGT lineage) — covers ears and most of the mandible. Maximum protection, most weight, interferes with comms and NVG mounting. Declining in modern use.
  • ACH / MICH cut — slight cut above the ears for in-ear comms. The US Army's primary helmet cut from 2003 onward. ACH = Army spec; MICH (Modular Integrated Communications Helmet) = SOCOM variant.
  • High-cut (FAST-style) — aggressive cut above and behind the ear for unobstructed comms, rail systems, and lightweight wear. Originated with Ops-Core FAST; now widespread in SOF and aggressive-posture LE.
  • Super-high-cut — further reduction, typically matched with ARC rails. Fewer ballistic issues than assumed — the cut panels rarely catch hits in actual use.

See the helmet cuts explainer and the MICH/ACH/FAST selection guide for deeper comparisons. For LE departments specifically, ballistic helmets for LE covers the operational tradeoffs.

Retention, pads, and fit

Retention and fit are as important as shell ballistic rating. A properly-sized shell on a poorly-fitted pad system can still fail blunt-impact tests:

  • Pad systems (Team Wendy CAM-Fit, Oregon Aero, D3O) — foam pads in varying thicknesses. Simplest, most forgiving of head-shape variation.
  • Dial/harness systems (BOA, Galvion Caiman, Ops-Core H-Nape) — tensioned perimeter band with pad contact points. More adjustable under-wear; heavier than pads.
  • Hybrid — dial tensioning on a pad shell. Increasingly common on premium helmets.

Details in pad systems vs dial retention. Weight tradeoffs in weight vs protection.

NVG mounting

Most modern helmets pre-drill for NVG shrouds. The two dominant shroud systems:

  • Wilcox L4 series — legacy standard, rugged, the default on MICH and FAST lineage.
  • Ops-Core VAS (Visual Augmentation System) — newer, lighter, integrated with Ops-Core's shroud ecosystem and widely adopted by SOCOM and high-tier LE.

The NVG mounting explainer covers shroud-to-helmet compatibility and what to spec in a helmet procurement if you plan on optics downstream.

Manufacturers

Helmet OEMs tracked on ArmorOS include Team Wendy, Gentex (Ops-Core), 3M Ceradyne, Revision Military (Galvion), Hard Head Veterans, Avon Protection, and BAE Systems Personnel Protection. Several body-armor OEMs (Point Blank, Armor Express, Safariland) also stock helmets — see each manufacturer's detail page for their helmet line.

Browse the full manufacturer directory at /manufacturers. Filter to helmet-capable MFGs using the type facet (coming with Phase D ingest).

Products

Every helmet product with NIJ CPL (or MIL-DTL equivalent) certification appears in the certified products directory. Status, level, and test-standard are surfaced per product.

Procurement

Helmet procurement typically flows through:

  • Agency-direct RFPs (common for larger departments)
  • Cooperative purchasing contracts (state and NASPO — less consistent than for body armor)
  • DoD contract flow-downs for LE programs with federal partnership

See LE procurement helmet bids for how specification language drives bid responses, and how helmet specs differ structurally from body-armor specs.

References

Ballistic Helmets — The Complete ArmorOS Guide · ArmorOS