Description
Trijicon ACOG 4x32 Riflescope, Dual Illum Red Chevron M193 TA31-D-100288 is a high-performance optical sight designed for precision shooting and tactical applications. This compact and rugged scope features a fixed 4x magnification, providing an ideal balance between close-quarter engagement and medium-range target acquisition. The dual illumination system, combining fiber optics and tritium, ensures a bright reticle in any lighting condition without the need for batteries.
The TA31-D-100288 model boasts a red chevron reticle specifically calibrated for 5.56x45mm M193 / 55 Grain ammunition, offering shooters enhanced accuracy and quick target engagement. With its generous eye relief of 1.5 inches and a wide field of view of 36.8 feet at 100 yards, this ACOG (Advanced Combat Optical Gunsight) provides rapid target acquisition and situational awareness.
Constructed with aircraft-grade aluminum and finished in a non-reflective black coating, this riflescope is built to withstand harsh environments and heavy recoil. Its compact design, measuring just 5.8 inches in length and weighing 9.9 ounces, makes it an excellent choice for both military and law enforcement personnel, as well as civilian shooters seeking a reliable and durable optic.
Ideal For: Military and law enforcement operations, competitive shooting, home defense, and tactical training scenarios where quick target acquisition and durability are paramount.
Features:
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DUAL ILLUMINATION SYSTEM: Combines fiber optics for daylight brightness and tritium for low-light conditions, ensuring a visible reticle without batteries.
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RUGGED CONSTRUCTION: Forged from aircraft-grade aluminum with a hard-anodized finish, designed to withstand extreme conditions and heavy recoil.
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BALLISTIC RETICLE: Red chevron reticle calibrated for 5.56x45mm M193 / 55 Grain ammunition, providing quick and accurate target engagement.
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FIXED MAGNIFICATION: 4x magnification offers an optimal balance between close-quarter combat and medium-range precision shooting.
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WIDE FIELD OF VIEW: 36.8 feet at 100 yards allows for enhanced situational awareness and rapid target acquisition.
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COMPACT AND LIGHTWEIGHT: Measuring 5.8 inches in length and weighing only 9.9 ounces, ideal for maintaining weapon balance and maneuverability.
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GENEROUS EYE RELIEF: 1.5 inches of eye relief provides comfort and safety, even when using the optic with heavy recoiling firearms.
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WATERPROOF AND FOG PROOF: Nitrogen-filled and sealed to ensure clear, unobstructed vision in all weather conditions and environments.
Specifications:
| Specification | Detail |
|---|---|
| Model | TA31-D-100288 |
| Magnification | 4x |
| Objective Lens Diameter | 32mm |
| Reticle | Red Chevron (5.56x45mm M193 / 55 Grain) |
| Illumination | Dual (Fiber Optics & Tritium) |
| Length | 5.8" |
| Weight | 9.9 oz |
| Eye Relief | 1.5" |
| Field of View | 36.8 ft @ 100 yards (7°) |
| Exit Pupil | 8.1 mm |
| Adjustment Click Value | 2 clicks/inch @ 100 yards |
| Finish | Black |
| Housing Material | Aircraft-grade Aluminum |
| Parallax Setting | Fixed |
| Waterproof | Yes |
| Fog Proof | Yes |
| Battery | No battery required |
| SKU/MPN | 100288 |
| UPC | 719307306882 |
What's Included:
- Trijicon ACOG 4x32 Riflescope
- Lens Covers
- User Manual
- Warranty Card
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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)