Description
The Trijicon ACOG 4x32 Dual-Illum Riflescope Cerakote OD Green, Green Crosshair TA31-C-100379 is a high-performance optical sight designed for precision and durability. This rugged riflescope features a forged 7075-T6 aircraft-aluminum-alloy housing with an OD Green Cerakote finish, providing exceptional resistance to wear and corrosion. The 4x magnification and 32mm objective lens offer a clear, crisp sight picture for accurate target acquisition.
Equipped with a dual-illuminated green crosshair reticle, this ACOG (Advanced Combat Optical Gunsight) utilizes both fiber optics and tritium for automatic brightness adjustment based on ambient light conditions. This battery-free illumination system ensures reliable performance in any environment, from bright daylight to low-light situations. The reticle also incorporates a bullet drop compensator (BDC) for .223/5.56 ammunition, allowing for precise shots out to 600 meters without manual adjustments.
The Trijicon ACOG 4x32 Dual-Illum Riflescope is designed with the "Both Eyes Open" concept, enabling rapid target acquisition in close-quarter battle (CQB) scenarios while maintaining situational awareness. Its compact size, lightweight construction, and durable build make it an ideal choice for military personnel, law enforcement officers, and civilian shooters who demand reliability and performance in challenging conditions.
Ideal For: Military and law enforcement operations, competitive shooting, hunting, and tactical applications where quick target acquisition and durability are essential.
Features:
-
DUAL ILLUMINATION SYSTEM: Battery-free, fiber optic and tritium-powered reticle automatically adjusts brightness based on ambient light conditions for consistent visibility in any environment.
-
RUGGED CONSTRUCTION: Forged 7075-T6 aircraft-aluminum-alloy housing with OD Green Cerakote finish provides exceptional durability and corrosion resistance, ensuring longevity in harsh conditions.
-
ADVANCED OPTICS: 4x magnification with a 32mm objective lens delivers clear, crisp sight picture and generous eye relief for rapid target acquisition and improved accuracy at various distances.
-
COMBAT-PROVEN DESIGN: Extensively field-tested and widely used in combat situations, the ACOG has earned a reputation for reliability and performance under extreme conditions.
-
BULLET DROP COMPENSATION: Integrated BDC reticle allows for precise shot placement out to 600 meters without manual adjustments, enhancing long-range accuracy for .223/5.56 ammunition.
-
BINDON AIMING CONCEPT: "Both Eyes Open" design facilitates rapid target acquisition in CQB scenarios while maintaining peripheral vision and situational awareness.
-
VERSATILE MOUNTING: Includes a flattop mount for easy installation on Picatinny rail systems, ensuring compatibility with a wide range of firearms and platforms.
-
COMPACT AND LIGHTWEIGHT: Weighing just 1 pound and measuring 5.8 inches in length, this ACOG offers high performance in a portable package suitable for extended field use.
Specifications:
| Specification | Detail |
|---|---|
| Model | TA31-C-100379 |
| Magnification | 4x |
| Objective Lens Diameter | 32mm |
| Reticle | Green Crosshair .223 BAC |
| Illumination | Dual (Fiber Optic & Tritium) |
| Housing Material | 7075-T6 Aluminum Alloy |
| Finish | OD Green Cerakote |
| Weight | 9.9 oz (280.7 g) |
| Length | 5.8" (147.3 mm) |
| Eye Relief | 1.5" (38.1 mm) |
| Field of View | 7° (36.8 ft @ 100 yards) |
| Exit Pupil | 8.1 mm |
| Adjustment | 2 clicks/inch @ 100 yards |
| Parallax Setting | Fixed |
| Mount Type | Flattop |
| Waterproof | Yes |
| Battery | None required |
| SKU/UPC | 719307307964 |
| MPN | 100379 |
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)