The Atomic Defense MICH/ACH Ballistic Helmet is an Aramid-shell ballistic helmet rated to NIJ Level IIIA+ — tested beyond NIJ 0101.06 Level IIIA requirements against 18 rounds of varying calibers, compared to the 4 rounds NIJ mandates per test. It stops confirmed threats including .44 Magnum 240gr SJHP, .50 Cal American Eagle 350gr JHP, 7.62x25mm Tokarev steel-jacket FMJ, and 5.7x28mm SS195, among others. Available in Black, Green, or Tan, in two sizes (S/M/L and L/XL/XXL), the helmet ships with its full accessory complement — ARC rails, NVG shroud, four-point chin strap, and two interior padding sets — included in the box.

Who this is for

• Law enforcement and security professionals who need a duty-rated ballistic helmet with proven multi-hit capability and standard ARC/NVG compatibility without proprietary limitations.
• Prepared civilians and home-defense planners who want military-specification Aramid construction and a lifetime warranty in a helmet available on the private market.
• Tactical shooters and force-on-force training participants who require certified IIIA+ ballistic protection alongside practical rail space for lights, cameras, and night-vision optics.

Threat rating and standard

This helmet carries a NIJ Level IIIA+ designation, meaning it surpasses the NIJ 0101.06 Level IIIA threshold. NIJ Level IIIA is the highest ballistic rating achievable in a wearable helmet form factor — no production helmet currently achieves an RF3 or Level IV rifle-defeating standard. The NIJ IIIA baseline requires a helmet to stop .357 SIG FMJ rounds at 1,469.82 fps and .44 Magnum rounds at 1,430.45 fps. This helmet meets those thresholds and continues beyond them through additional multi-caliber testing.

The helmet also satisfies several international standards: Mil-Std 662 E (US), UK/SC/5449 (UK), STANAG 2920 (NATO), VPAM PM 1–5 with PM 6 resistance, TR DE SK L-2 with SK 3 resistance, HOSDB HG1/A–HG2 with RF1 resistance, GOST Class 1–2A with Class 3 resistance, and GOST 2017 BR 1–3 with BR 4 resistance. It also provides protection against stab/spike attacks and shrapnel/fragmentation.

Confirmed stopped rounds

Shell material and construction

The ballistic shell is Aramid — the same fiber class used in law-enforcement and military helmet programs — with a smooth-coat interior finish. The outer surface uses low-visibility paint that absorbs light rather than reflecting it, reducing visual signature in low-light environments. The construction is fire-, water-, and dust-resistant throughout. An all-weather shield on the exterior extends service life to 5–7 years under normal care and use. Each helmet ships with a QR-coded certification sticker linking directly to its individual test sheet, which documents the tested ammunition, angles, back-face deformation values, and distances.

Suspension and retention

The interior uses a ratcheting head-capture system that adjusts rapidly in the field and fits a wide range of head shapes within each size band. Two interior padding sets are included — one thinner set and one thicker — and they can be mixed and matched as needed, provided the tan safety padding layer remains in place. All padding attaches via Velcro and holds its shape over years of use. The four-point chin strap features a cloth chin grip for comfort and fully adjustable buckles for a secure, stable fit under movement and impact.

Mount compatibility

The ARC rail system runs in both vertical and horizontal configurations, accepting standard ARC-compatible accessories without proprietary adapters. An ARC-to-Picatinny adapter is included in the box, opening compatibility to the full range of Picatinny-standard lights, cameras, and communication mounts. An NVG shroud comes pre-installed (color-matched), compatible with standard multi-NVG mounts and Wilcox- or Norotos-style devices. A two-point bungee system integrates into the ARC rails. The helmet is also compatible with ComTac headsets by 3M. A clear Level IIIA ballistic face shield is available separately.

Sizing

Two sizes cover the full adult head-circumference range. Head circumference is measured starting just above the brow line. Refer to the table below to select the correct size.

Specifications

Frequently asked questions

Can this helmet be shipped to my state?

It depends on your state. Ballistic helmets cannot be shipped to New York or Connecticut due to state body armor restrictions. Under 18 U.S.C. § 931, anyone with a federal felony conviction for a crime of violence is prohibited from purchasing or possessing body armor. Subject to US export regulations.

What does NIJ Level IIIA+ mean, and what does it stop?

NIJ Level IIIA is the highest ballistic rating achievable in a wearable helmet. The "+" designation indicates this helmet is tested beyond the NIJ minimum — against 18 rounds of varying calibers versus the 4-round NIJ requirement. It stops rounds including .357 SIG, .44 Magnum, .50 Cal AE, 7.62x25mm Tokarev steel-jacket, 5.7x28mm, .30-Cal Carbine, and all common handgun calibers, plus shrapnel and stab/spike threats.

Will this helmet stop rifle rounds like 5.56 or 7.62x39?

No. NIJ Level IIIA is the highest rating achievable in a wearable ballistic helmet. No production helmet stops centerfire rifle rounds such as 5.56x45 M193 or 7.62x39 MSC. The HOSDB RF1 standard referenced in this helmet's compliance list covers fragmentation and lower-energy projectiles, not high-velocity rifle fire.

What NVG mounts and rail accessories will fit this helmet?

The ARC rail system accepts all standard ARC-compatible accessories, and the included ARC-to-Picatinny adapter extends compatibility to Picatinny-standard mounts. The pre-installed NVG shroud is compatible with standard multi-NVG mounts, including Wilcox- and Norotos-style devices. ComTac headsets by 3M are also compatible. No proprietary adapters are required for standard military-configuration accessories.

How do I choose between S/M/L and L/XL/XXL?

Measure your head circumference just above the brow line. S/M/L fits 20–23 inches (50–59 cm), corresponding to US hat sizes 6 1/4 to 7 1/2. L/XL/XXL fits 22–27 inches (57–69 cm), corresponding to hat sizes 7 1/8 to 8 1/2+. If you fall in the 22–23 inch overlap zone, either size can work — contact us to discuss which fits your accessory load and use case.

How long will this helmet last, and what is the warranty?

The Aramid construction with all-weather exterior shield gives this helmet a service life of 5–7 years under normal care and use. Every helmet comes with a 100% transferable lifetime warranty covering parts and labor. Each unit also ships with an individually QR-coded certification sheet documenting its test data.

What is the difference between the MICH and ACH, and how do they compare to PASGT?

The MICH (Modular Integrated Communications Helmet) was developed to replace the heavier PASGT, adding ARC attachment rails and NVG mount capability without drilling. The ACH followed with incremental refinements. Both designs sit lower-profile against the head than the PASGT for improved comfort and stability. The MICH/ACH design remains the standard available on the private market, as the US military has begun transitioning to the Enhanced Combat Helmet (ECH).