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Trijicon ACOG 4x32mm — Flat Dark Earth — Illuminated Red Chevron .223/5.56 BDC Reticle (100310) — Informational Overview
The Trijicon ACOG 4x32mm in Flat Dark Earth (FDE) is a fixed-magnification optic configured with an illuminated red chevron reticle and a .223/5.56 BDC (bullet drop compensating) reticle system. This model is identified by part number 100310 and UPC 719307307247. ACOG optics are widely recognized for combining a compact fixed-power design with an etched reticle and illumination system intended to support rapid target identification and consistent hold references at varying distances (BDC effectiveness depends on ammunition and setup variables).
Key Identifiers
Brand: Trijicon
Product Line: ACOG
Magnification: 4x (fixed)
Objective Size: 32mm
Reticle: Illuminated Red Chevron
BDC Caliber Reference: .223 Rem / 5.56 NATO BDC
Color: Flat Dark Earth (FDE)
Model / Part Number: 100310
UPC: 719307307247
4x32 Fixed Magnification: Practical Viewing Format
A 4x fixed-magnification optic provides a consistent sight picture without variable zoom settings. Fixed optics are commonly chosen when users want:
A repeatable magnification level for consistent sighting
A simpler control layout (fewer moving parts and no zoom ring)
A compact optic profile compared with many variable-power scopes
A 32mm objective lens size is often associated with a balance between light-gathering capability and maintaining a relatively compact overall footprint.
Illuminated Red Chevron Reticle: Visibility and Aiming Reference
This configuration uses an illuminated red chevron reticle. Chevron-style reticles typically provide:
A distinct, high-contrast aiming reference
A defined point or tip for precise aiming holds
A shape that can remain readable across different backgrounds
Illumination visibility depends on ambient lighting and the optic’s illumination system design. Trijicon ACOG illumination systems are often associated with designs intended to remain usable across a range of conditions, though exact behavior depends on the specific model.
.223/5.56 BDC Reticle: Hold References and Ammunition Variables
This ACOG is listed with a .223/5.56 BDC reticle. BDC reticles are designed to provide holdover references intended to correspond to bullet drop at increasing distances. Practical BDC alignment can vary based on:
Ammunition type (bullet weight and velocity)
Barrel length
Atmospheric conditions (temperature, altitude, pressure)
Zero distance and mounting height over bore
For best results, many users confirm their optic’s BDC correspondence by validating holds at known distances with their specific ammunition and rifle configuration.
Flat Dark Earth Finish: Color Matching and Appearance
The FDE colorway is often used to match or complement earth-tone equipment and hardware. Finish appearance can vary slightly across production runs and between different materials, but the intent is generally a subdued, non-reflective look in a tan/earth palette.
Mounting and Compatibility Notes (General)
Optic fit and setup typically depend on:
The mounting interface used by the optic and mount (e.g., rail type)
Eye relief requirements and mounting position
Clearance with backup sights or other accessories
Confirming the optic is properly secured and torqued per manufacturer guidance
Because the listing includes only the optic identifiers and core spec, users often verify whether a mount is included or required separately, depending on retailer packaging.
Responsible Use and Legal Notes
Optics and their accessories may be regulated differently depending on jurisdiction and intended use, including export restrictions for certain products. Users typically confirm compliance with applicable local laws and any relevant regulations before purchase, transport, or international travel.
Quick Reference Summary
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