ArmorOS

Library

Guides & Briefs

Manufacturer-neutral reference content for body armor procurement professionals. New briefs published automatically when regulatory monitoring agents detect a material change.

Guide·Apr 20, 2026

Ballistic Helmets — The Complete ArmorOS Guide

The authoritative hub for ballistic helmets — NIJ 0106 and ACH-GEN-II standards, cut styles (ACH / MICH / FAST / high-cut), pad vs dial retention, NVG mounting (Wilcox, Ops-Core VAS), and procurement. Source-cited across every spec.

Guide·Apr 20, 2026

ACH-GEN-II — The Military Helmet Spec LE Actually Cares About

ACH-GEN-II is the US Army's performance specification for Advanced Combat Helmet and its derivatives. It covers fragmentation V50, 9mm V50, backface deformation, and retention — a tougher spec than NIJ 0106. This guide covers what it specifies and why LE agencies increasingly require it.