ArmorOS

Library

Guides

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

How Ceramic Strike Faces Are Made — Pressing, Sintering, Tile Arrays

Ceramic strike-face manufacturing — pressing, sintering, tile array vs monolithic — is more expensive and finicky than the chemistry of the ceramic itself suggests. This guide covers the two dominant production paths, why boron carbide is still expensive, and what the ceramic suppliers (3M, Morgan, CoorsTek) actually do differently.

Guide·Apr 20, 2026

Body Armor Supply Chain — The Complete ArmorOS Guide

The body-armor industry rests on a thin, globally consolidated supply chain — a handful of fiber producers (DuPont Kevlar, Avient Dyneema, Honeywell Spectra), ceramic suppliers (Morgan, CoorsTek), and prepreg makers. This guide maps the upstream supply chain that determines what every OEM can actually build.

Guide·Apr 20, 2026

Aramid Fibers — Kevlar vs Twaron vs Heracron

Para-aramid fibers founded modern body armor — DuPont's Kevlar (1971) and Teijin's Twaron led the market before UHMWPE emerged. This guide compares the four major para-aramid suppliers (DuPont, Teijin, Hyosung, Kolon) and where each is used today.

Guide·Apr 20, 2026

Helmet Retention — Pad Systems vs Dial Harnesses

A properly-rated ballistic helmet fails to protect if the retention is wrong. This guide compares foam pad systems (Team Wendy CAM-Fit, Oregon Aero), dial harnesses (BOA, Galvion Caiman, Ops-Core H-Nape), and hybrid configurations — with selection guidance by mission.

Guide·Apr 20, 2026

NVG Mounting — Wilcox L4 vs Ops-Core VAS

Wilcox L4 and Ops-Core VAS are the two NVG shroud systems that matter. This guide covers shroud-to-helmet compatibility, J-arm and dovetail standards, and how to specify a helmet so your downstream NVG loadout just works.

Guide·Apr 20, 2026

Helmet Weight vs Protection — The Real Tradeoff

Modern helmet weight reduction rarely comes from ballistic compromise — it comes from shell-material upgrades (UHMWPE composite) and cut optimization. This guide covers where the weight is, how much can be shaved without losing rating, and the fatigue math that determines fielded-wear success.

Guide·Apr 20, 2026

ASTM E3141 — The LE Shield Test Method

ASTM E3141 defines how to test ballistic LE shields — shot placement, velocity measurement, acceptance criteria — the protocol that makes E3347 compliance a defensible certification. This guide covers the test structure and what distinguishes it from NIJ 0108.01's panel-centric methodology.

Guide·Apr 20, 2026

Body Armor — The Complete ArmorOS Guide

The authoritative hub for US body armor — NIJ 0101.06 vs 0101.07, civilian purchase rules, BVP grant eligibility, LE procurement paths, dealer directory, and product-level certifications. Every linked guide is sourced from primary documents.

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

Ballistic Shields — The Complete ArmorOS Guide

The authoritative hub for ballistic shields — NIJ 0108.01 plus the new ASTM E3347 specification and E3141 test method, handheld vs standoff shields, viewport options, maintenance, and LE 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.

Guide·Apr 20, 2026

NIJ 0106 — The US Ballistic Helmet Standard Explained

NIJ 0106 is the primary US civil-sector ballistic-helmet certification. This guide covers its three handgun-only threat levels (I, IIA, II), why the standard doesn't address rifle threats, and why most LE procurement specifications pair it with military ACH-GEN-II.

Guide·Apr 20, 2026

LE Helmet Procurement — RFP Language That Actually Works

Most LE helmet RFPs either under-specify (and get bids from vendors whose product doesn't actually meet real requirements) or over-specify (locking to a single vendor). This guide covers the specification language patterns that capture the right envelope while keeping competition open.

Guide·Apr 20, 2026

NIJ 0108.01 — The Legacy Shield Standard, Still Required

NIJ 0108.01 has governed US ballistic shield certification since 1985. This guide covers its six threat levels, panel-only test scope, and how modern LE procurement increasingly pairs it with the newer ASTM E3347 specification for a full-assembly shield qualification.

Guide·Apr 20, 2026

ASTM E3347 — The New LE Shield Performance Specification

ASTM E3347 is the first US performance specification purpose-built for LE ballistic shields. It covers shield body, edges, viewports, fasteners, and weak points — going beyond NIJ 0108.01's panel-only scope. This guide covers what E3347 actually tests and why it's rapidly becoming a procurement requirement.

Guide·Apr 19, 2026

DoD Security Forces Armor — GSA 84, NASPO, or Direct DoD

The three paths for DoD Security Forces armor procurement — GSA Schedule 84, DoD direct contract vehicles, and state-level cooperative contracts — overlap, but each has an optimal use case. AFGSC ICBM security, Sentinel site build-out, and F-35 base SF all have different procurement footprints.