Description
The Trijicon ACOG 4x32 .223 100091 Illum Amber Crosshair 223 Riflescope TA01NSN 100091 is a top-tier optical sight designed to meet the exacting standards of US Special Operations Command. This compact and rugged riflescope offers unparalleled performance for elite forces and civilian marksmen alike. With its 4x magnification and 32mm objective lens, it provides an optimal balance of field of view and target acquisition capability.
Featuring an illuminated amber crosshair reticle specifically calibrated for .223/5.56 ammunition, this ACOG (Advanced Combat Optical Gunsight) ensures precise aiming in various lighting conditions. The tritium-powered illumination requires no batteries, guaranteeing reliable operation when you need it most. Its durable construction makes it resistant to shock, vibration, and extreme environmental conditions.
The Trijicon ACOG 4x32 .223 100091 boasts a fixed parallax setting and internal adjustment mechanisms, simplifying operation and maintaining zero under harsh conditions. With its generous eye relief and compact design, this riflescope is ideal for rapid target engagement and close to medium-range shooting scenarios. Its waterproof capabilities up to 500 feet underscore its reliability in any environment.
Ideal For: Military and law enforcement personnel, competitive shooters, and civilian firearm enthusiasts seeking a battle-proven optic for their AR-15 platform or similar .223/5.56 rifles. This ACOG excels in both tactical situations and recreational shooting, offering unmatched durability and optical clarity.
Features:
-
COMBAT-PROVEN DESIGN: Engineered to US Special Operations Command specifications, ensuring reliability in the most demanding situations[1].
-
ILLUMINATED RETICLE: Amber crosshair reticle with tritium illumination for clear aiming point in all lighting conditions, no batteries required.
-
RUGGED CONSTRUCTION: Forged 7075-T6 aircraft-aluminum housing provides exceptional durability and resistance to environmental extremes.
-
WATERPROOF PERFORMANCE: Sealed and nitrogen-filled, maintaining integrity up to 500 feet underwater for all-weather reliability.
-
BALLISTIC COMPENSATING RETICLE: Calibrated for .223/5.56 ammunition, offering precise holdovers for extended range shooting.
-
FIXED MAGNIFICATION: 4x magnification offers an ideal balance between situational awareness and target identification.
-
COMPACT AND LIGHTWEIGHT: Weighing just 14.96 oz with a length of 5.8", it minimizes bulk without sacrificing performance.
-
MULTI-COATED OPTICS: Advanced lens coatings deliver superior light transmission and clarity for enhanced target acquisition.
Specifications:
| Specification | Detail |
|---|---|
| SKU/MPN | 100091 |
| UPC | 719307300538 |
| Magnification | 4x |
| Objective Lens Diameter | 32mm |
| Weight | 14.96 oz |
| Length | 5.8" |
| Eye Relief | 1.5" |
| Field of View | 7° (36.8 ft @ 100 yards) |
| Exit Pupil | 8.1 mm |
| Reticle | Amber .223 Crosshair |
| Illumination | Tritium (No batteries required) |
| Adjustment Click Value | 2 clicks/inch @ 100 yards |
| Parallax Setting | Fixed |
| Finish | Black |
| Waterproof Depth | Up to 500 feet |
| Housing Material | 7075-T6 Aircraft Aluminum |
What's Included:
- Trijicon ACOG 4x32 .223 100091 Riflescope
- Scope cover
- Mounting base
- User manual
Our Guarantees
FREE Fast Shipping Over $99
Enjoy complimentary expedited shipping on all orders over $99.
Secure Payments
Shop with confidence using our encrypted payment processing.
High Quality or Money Back
Not satisfied with your purchase? We'll refund your money, no questions asked.
Top-Notch Support
Our expert team is available to answer all your questions and provide assistance.
What Our Customers Say
Optics Knowledge Center
Understanding Rifle Scope Basics
Magnification
Magnification refers to how much larger an object appears through the scope compared to the naked eye. Fixed power scopes have one magnification setting, while variable power scopes offer a range (e.g., 3-9x).
Objective Lens
The objective lens is the front lens that gathers light. Larger objective lenses (measured in mm) gather more light, providing brighter images in low-light conditions but add weight and require higher mounting.
Reticle
The reticle (crosshair) is the aiming point inside the scope. Modern scopes offer various reticle designs, from simple duplex crosshairs to complex ballistic reticles with holdover points for different distances.
Adjustments
Rifle scopes have turrets for windage (horizontal) and elevation (vertical) adjustments. These are measured in MOA (minutes of angle) or MRAD (milliradians) and allow precise aiming adjustments.
Proper Scope Mounting Guide
Select the Right Rings & Base
Choose rings that match your scope's tube diameter (typically 1", 30mm, or 34mm). Select a base compatible with your rifle's receiver. For heavy-recoiling rifles, opt for stronger mounts.
Install the Base
Clean the receiver and base thoroughly. Apply a small amount of blue Loctite to the screws. Attach the base to the receiver and torque the screws to manufacturer specifications.
Attach the Rings
Attach the bottom halves of the rings to the base. Place the scope in the rings and loosely attach the top halves. Don't fully tighten yet.
Set Eye Relief & Level
Position the scope for proper eye relief (3-4 inches) in your normal shooting position. Ensure the reticle is level using a scope leveling tool. Once positioned correctly, tighten the rings evenly in a cross-pattern.
Scope Zeroing Tips
Start Close
Begin zeroing at a shorter distance (25-50 yards) to ensure you're on paper before moving to your desired zero distance (typically 100 yards).
Use a Stable Rest
Always zero your rifle from a stable shooting position using a bench rest, sandbags, or a shooting rest to eliminate as much human error as possible.
Fire Groups
Fire 3-shot groups before making adjustments. This provides a more accurate representation of where your rifle is shooting than single shots.
Make Deliberate Adjustments
Know your scope's adjustment values (typically 1/4 MOA per click). If your group is 2 inches low at 100 yards, you'll need to adjust up 8 clicks (for a 1/4 MOA scope).
Confirm Your Zero
After making adjustments, fire another group to confirm your zero. Repeat the process until your point of impact matches your point of aim.
Document Your Settings
Once zeroed, record your settings including distance, ammunition used, and environmental conditions for future reference.
Optics Maintenance & Care
Cleaning Lenses
- Start by blowing or brushing away loose particles
- Use a lens pen or microfiber cloth for fingerprints
- For stubborn dirt, use lens cleaning solution (never household cleaners)
- Clean with gentle circular motions from center outward
Protecting Your Optics
- Always use lens caps when not in use
- Store in a dry place with silica gel packets
- Avoid extreme temperature changes
- Use a quality scope cover in harsh conditions
Regular Maintenance
- Check and tighten mount screws periodically
- Inspect O-rings and seals for damage
- Verify zero after rough handling
- Clean the exterior with a damp cloth
What to Avoid
- Never use fingers to touch lenses
- Avoid paper products (tissues, paper towels) on lenses
- Don't use acetone, alcohol, or household cleaners
- Never disassemble your scope (voids warranty)