The Compass Armor ACH3A-RM is a full-cut MICH 2000 style Advanced Combat Helmet built to NIJ Level IIIA ballistic performance standards. Constructed from Kevlar aramid, this tactical helmet stops handgun threats through .44 Magnum and 9mm at standard test velocities. It ships in four sizes — S, M, L, and XL — and in multiple colorways including Black, Army Green, Tan, and Camouflage, with an integrated NVG mount and side rails included at the base price of $284.99.

Who this is for

• Law enforcement and security professionals who need a field-proven MICH-profile helmet with accessory rail integration and NVG compatibility for duty or training use.
• Military and tactical unit members requiring a full-cut ACH-style shell with Level IIIA ballistic protection, sized to accommodate communication headsets and hearing protection.
• Private citizens and prepared-household buyers seeking NIJ IIIA-rated head protection in a combat-proven form factor with a five-year manufacturer warranty.

Threat rating and standard

This helmet is rated to NIJ Level IIIA, the highest concealable-armor handgun standard under NIJ 0101.06. Level IIIA covers common high-velocity handgun threats including 9mm full metal jacket and .44 Magnum lead semi-wadcutter hollow point rounds. Like all wearable ballistic helmets, this shell does not protect against rifle-caliber threats — no production combat helmet in wearable form achieves Level III or Level IV rifle-round protection. If your threat assessment includes rifle fire, supplemental plate-based protection is necessary.

Shell material and construction

The shell is fabricated from Kevlar aramid composite — the same fiber family used in U.S. military ACH procurement — giving it a favorable strength-to-weight ratio across all four sizes. The outer surface is waterproof and UV-protected, and the shell carries a fireproof rating as well. The full-cut profile provides ear and temple coverage greater than high-cut FAST-style helmets, trading some accessory-mount flexibility for broader ballistic coverage area. A hardhat-equivalent structural rating is also noted, making this a dual-use option in environments where both ballistic and impact hazards exist.

Suspension and retention

Interior comfort and fit come from a seven-piece self-adjustable sponge padding system. The pads allow independent positioning adjustments so the helmet seats consistently across the four head-circumference size ranges. This padding approach is functionally similar to the Oregon Aero and Team Wendy pad systems found in issued ACH helmets, though pad-kit compatibility with third-party aftermarket systems is not confirmed — contact us if you need clarification before purchasing.

Mount compatibility

The ACH3A-RM ships with an NVG mount (shroud) at the front crown and side accessory rails on both temples. The side rails accept quick-attach and quick-release accessories including flashlights, cameras, and visors. Rail format and shroud interface specifications (Wilcox-compatible, Norotos-compatible, or proprietary) are not published — contact us to confirm compatibility with specific NVG arms or rail-mounted accessories before ordering.

Sizing

Four sizes cover head circumferences from 52 cm to 63 cm (approximately 20.5 to 24.8 inches). Shell weights run 3.35 lbs for size S through 3.79 lbs for size XL. Use the circumference measurements below to select your size — measure around the largest part of your head, approximately one inch above the eyebrows.

Specifications

Frequently asked questions

Can this helmet be shipped to my state?

This helmet cannot be shipped to New York or Connecticut due to state body armor restrictions. It is also subject to U.S. export regulations. 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.

What does NIJ Level IIIA mean for a helmet?

NIJ Level IIIA is the highest handgun-rated tier under NIJ 0101.06. It covers 9mm full metal jacket and .44 Magnum lead semi-wadcutter hollow point rounds at standard test velocities. This rating applies to the ballistic shell itself. The helmet does not protect against rifle-caliber threats at any velocity — that is a physical limitation of all wearable helmet formats currently available.

Will this helmet stop rifle rounds?

No. Level IIIA covers handgun threats only. No production wearable ballistic helmet currently achieves Level III or Level IV rifle-round protection. If your threat environment includes rifle fire, body armor plates worn on the torso are the appropriate solution — helmets address fragmentation and handgun threats by design.

How heavy is this helmet and is the weight tolerable for prolonged wear?

Shell weights range from 3.35 lbs (size S) to 3.79 lbs (size XL). These figures are typical for Kevlar ACH-profile helmets at IIIA ratings. For sustained wear beyond two to three hours, a quality suspension harness and properly fitted pad system matter significantly — the seven-piece adjustable pad kit included here helps distribute load and reduce pressure points.

What size do I need?

Measure the circumference of your head approximately one inch above your eyebrows using a flexible tape. Size S fits 52–56 cm (20.5–22.0 in), M fits 54–57 cm (21.3–22.4 in), L fits 57–59 cm (22.4–23.2 in), and XL fits 59–63 cm (23.2–24.8 in). Note that S and M overlap at 54–56 cm — if you fall in that range, M typically provides more adjustment headroom with the pad system installed.

Are the side rails compatible with my NVG mount or communications accessories?

It depends on the accessory. The side rails accept quick-attach and quick-release accessories including flashlights, cameras, and visors. Specific rail format compatibility — for example, Wilcox or Norotos NVG arms, GPNVG-18 bridge mounts, or branded comms adapters — is not confirmed in published specifications. Contact us before ordering if you need to verify fitment with a specific accessory system.