Brand | Trijicon |
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Color | Green |
Style | Trijicon 4x32 ACOG Riflescope with Green Dual Illuminated Chevron Reticle and TA51 Mount |
Sport | Hunting |
Item Weight | 9.9 ounces |
Material | Aluminum |
Magnification Maximum | 4.0 |
Objective Lens Diameter | 32 Millimeters |
Magnification Minimum | 4 x |
Compatible Devices | Rifle |
Mounting Type | Pac |
Night vision | Yes |
Eye Relief | 38.1 Millimeters |
Field Of View | 7 Degrees |
Model Name | Trijicon - ACOG 4x32 - Dual Illuminated Green Chevron-TA51 Mount |
Manufacturer | Trijicon |
Reticle Type | Chevron |
UPC | 719307302945 |
Item Package Dimensions L x W x H | 8.7 x 8.1 x 5 inches |
Package Weight | 1.8 Pounds |
Item Dimensions LxWxH | 7.56 x 6.5 x 3.25 inches |
Brand Name | Trijicon |
Warranty Description | See Manufacturer |
Suggested Users | unisex-adult |
Number of Items | 1 |
Part Number | TA31F-G |
Included Components | Thumbscrew Flattop Adapter (TA51)|4x32 Scopecoat (TA64)|LENSPEN (TA56)|Lanyard Assembly for Adjuster Caps (TA71E)|Trijicon Logo Sticker (PR15)|ACOG Manual|Warranty Card |
Size | 4x32mm |
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Trijicon 4x32 ACOG Riflescope with Green Dual Illuminated Chevron Reticle and TA51 Mount
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Purchase options and add-ons
Brand | Trijicon |
Color | Green |
Style | Trijicon 4x32 ACOG Riflescope with Green Dual Illuminated Chevron Reticle and TA51 Mount |
Sport | Hunting |
Item Weight | 9.9 ounces |
Material | Aluminum |
Magnification Maximum | 4.0 |
Objective Lens Diameter | 32 Millimeters |
Magnification Minimum | 4 x |
Compatible Devices | Rifle |
About this item
- BATTERY-FREE ILLUMINATION: Features a tritium/fiber optic illuminated reticle that automatically adjusts the brightness based on available light
- “BOTH EYES OPEN” DESIGN: The ACOG can be used with “both eyes open,” utilizing the Bindon Aiming Concept
- RUGGED, RELIABLE HOUSING DESIGN: Fixed-power design allows for minimal moving parts to create a nearly indestructible sighting system
- OUTSTANDING CLARITY: The quality of the glass and multi-coated lenses maximize light-gathering capabilities and clear field of view with zero distortion; 4x magnification in this model
- BULLET DROP COMPENSATING & RANGING RETICLES: The Green Chevron ranging reticle allows for bullet drop compensation out to 800 meters without any manual adjustments
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Top Brand: Trijicon
From the manufacturer

Trijicon ACOG 4x32 BAC
Advanced Combat Optical Gunsight.
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ACOG 4x32 BAC
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Customer Reviews |
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Magnification | 4x |
Objective Lens | 32mm |
Eye Relief | 1.5 in |
Field of View (Degrees) | 7.0 |
Field of View | 36.6 ft. @ 100 yards |
Adjustments (Per Inch @ 100 Yards) | 2 Clicks |
Dimension (L x W x H) Without Mount | 5.9 x 2.0 x 2.5 in. |
Weight Without Mount | 10.5 oz. (297.5g) |
Illumination Source | Fiber Optics & Tritium |
Reticle Calibration | .223 / .308 / M193 / 300 BLK / 6.8 SPC |

The Scope That Changed Everything
The Trijicon ACOG (Advanced Combat Optical Gunsight) 4x32 BAC is a fixed power, compact riflescope with a dual-illuminated reticle (tritium and fiber optics) for domination in bright to low/no light. It comes with legendary durability and reliability and offers reticle patterns for numerous calibers. BAC stands for Bindon Aiming Concept, which means the ACOG's illuminated reticle allows aiming with 'both eyes open' for superior situational awareness.
There’s a reason one million ACOG 4x32 scopes have been trusted by the United States Marine Corps, United States Army, United States Navy, United States Air Force, United States Special Operations Forces, allies around the world and hundreds of thousands of civilian enthusiasts.

Brilliant Aiming Solutions
Trijicon has led the industry in the development of superior any-light aiming systems since the company’s founding in 1981. World-renowned for its innovative applications of tritium and advanced fiber-optics, Trijicon manufactures the most advanced riflescopes and sights for tactical and sporting applications.
Backed by a Limited-Lifetime Warranty, Trijicon’s aiming systems are proven on the range and in the field. As a result, Trijicon has earned the trust of those who are most in need of aiming accuracy and dependability. The company is proud to count as our customers the United States Marine Corps, United States Army, United States Special Operations Forces, United States Government, and state and local Law Enforcement, just to name a few. Trijicon is fast becoming the preferred scope among dedicated hunters for all types of game, as well as shooting enthusiasts worldwide.

Combat Proven
Increased Hit Potential in All Lighting Conditions.
Product Description
Product Description
Trijicon, ACOG, 4x32, Green Dual Illuminated, .223 Chevron Reticle, With TA51 Mount Superior quality glass lenses Combat proven Fixed magnification Rugged aluminum alloy housing Both eyes open design Product Description Manufacturer: Trijicon The Trijicon ACOG (Advanced Combat Optical Gunsight) is a fixed power, compact riflescope with an illuminated reticle pattern for use in bright to low/no light. The ACOG is designed to be extremely durable and reliable. Combining traditional, precise distance marksmanship with CQB speed, many variants include a bullet drop compensated (BDC) reticle. Every feature of its design was chosen for a single purpose: to provide increased hit potential in all lighting conditions. Manufacturer Part #: TA31F-G UPC: 719307302945"
Amazon.com
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Product information
Technical Details
Additional Information
ASIN | B002E6RDJY |
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Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #486,927 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #1,192 in Rifle Scopes |
Date First Available | June 21, 2009 |
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Trijicon 4x32 ACOG Riflescope with Green Dual Illuminated Chevron Reticle and TA51 Mount
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Important information
Legal Disclaimer
This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the scope crystal clear and easy to see in any light, with one noting the bullet drop compensator is sharply visible. Moreover, the scope is bright at night and works well in low light conditions, while being durable enough to last longer than the rifle. Additionally, they appreciate its ACOG design, ease of use, and washability, with one mentioning it comes with a lens pen for cleaning.
AI-generated from the text of customer reviews
Customers find the scope crystal clear and easy to see in any light, with one customer noting that the bullet drop compensator is sharply visible.
"...Using the scope is pretty much caveman proof. The instructions on how to use the scope are very easy to use and understand. NO BATTERIES!..." Read more
"...I've wanted one of these for about 8 yrs and it was worth the wait. Very clear, great eye relief, and durable. No complaints about the scope!" Read more
"Great scope, seems durable enough, crystal clear, bright as you would ever need. The green does not get washed out in a jungle environment...." Read more
"...What more do you need to say. It's worth the money. It's extremely clear. Well made and just plain awesome. Will last longer then the rifle...." Read more
Customers find the scope to be worth the investment.
"...I've wanted one of these for about 8 yrs and it was worth the wait. Very clear, great eye relief, and durable. No complaints about the scope!" Read more
"Great scope, seems durable enough, crystal clear, bright as you would ever need. The green does not get washed out in a jungle environment...." Read more
"It's an acog. What more do you need to say. It's worth the money. It's extremely clear. Well made and just plain awesome...." Read more
"Awesome product. Genuine optic verified by Trijicon." Read more
Customers appreciate the scope's brightness, particularly at night, with one customer noting its use of a radioactive isotope to illuminate the reticle.
"...The fact that it uses a radioactive isotope to illuminate the reticle makes it freaking awesome for those pesky EMP's and dirty bombs...." Read more
"Great scope, seems durable enough, crystal clear, bright as you would ever need. The green does not get washed out in a jungle environment...." Read more
"...Reticle Intensity - In the daylight it is outstanding - At night it is just enough with the tritium...." Read more
"Item operates just as you would expect." Read more
Customers find the scope durable, noting it will last longer than the rifle, with one customer describing it as built like a tank.
"...Very clear, great eye relief, and durable. No complaints about the scope!" Read more
"Great scope, seems durable enough, crystal clear, bright as you would ever need. The green does not get washed out in a jungle environment...." Read more
"...It's extremely clear. Well made and just plain awesome. Will last longer then the rifle. If you have the money to blow it's worth every penny" Read more
"...Pros: Rugged, waterproof, simply the best. Cons: None except for crud on the inside." Read more
Customers like the ACOG feature of the scope.
"It's an acog. What more do you need to say. It's worth the money. It's extremely clear. Well made and just plain awesome...." Read more
"It's a freaking ACOG. What's not to LOVE about this thing? Anyone with an assault rifle that has used this knows. I recommend to all." Read more
"It's an acog, what more do you need to say. Works amazing at night, and easy to center in and always keep on target." Read more
Customers find the scope easy to use.
"...The instructions on how to use the scope are very easy to use and understand. NO BATTERIES!..." Read more
"...with those and at ~$800 you can have a variable optic that is very trouble free and just as crystal clear...." Read more
"...The scope is great very clear rugged, and easy to use. Package was as described. and received quickly" Read more
Customers like the scope's optics, with one mentioning its well-designed features and another appreciating the green chevron reticle.
"I choose the 4 star rating because the scope is well designed, manufactured, and does what it is intended to do...." Read more
"Sweet little scope. This thing is incredibly clear. Love the green chevron easy to see in any light and works like a reflex site for quick target..." Read more
"It is amazing to see the difference between a quality optic and what we are used to seeing. It was gift to my son and he is amazed also." Read more
Customers appreciate the scope's washability, with one mentioning that the green reticle doesn't fade and another noting it comes with a lens pen for cleaning.
"...The green does not get washed out in a jungle environment. Seems to hold its zero and rocks with a mounted RMR." Read more
"...(product comes with lens pen for cleaning)..." Read more
"Bright at night, bright at day; no wash out issue, live up to the Acog name...." Read more
Reviews with images

Top reviews from the United States
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- Reviewed in the United States on March 19, 2013I give this TA31F a solid 5 star rating. I've taken this scope and used it seven times already and only made one adjustment (the first time) on my flat top Sig Sauer M400 AR-15. It was almost already zeroed in at 100 meters right out of the box which saved me time/ammo/money to zero in the scope.
PRO's: vision down the scope is clean and very clear. My green chevron reticle shows up no problem even in the day time. The bullet drop compensator is can be seen sharply and works like a charm. I was shooting as far as 300 meters and the bullets were hitting right on target.
Using the scope is pretty much caveman proof. The instructions on how to use the scope are very easy to use and understand.
NO BATTERIES! I was really worried about what scope to get, but i wanted something that was rugged and low maintenance. I have multiple friends that had some sharp looking Eotech's that worked very well... however, I just didnt want to deal with batteries. I do not regret this purchase and I think the ACOG looks great on my rifle.
CON's - Still looking for them
RECOMMENDATIONS: As a new AR-15 Rifle owner, i recommend this scope to anyone and everyone. If you know a friend, or see someone at the range, ask to check it out. Look at all the YouTube videos and do your research. It's pricey, but you get what you pay for.
- Reviewed in the United States on February 28, 2015I'm rating this review based on the scope and not the shipping and the hassle I went through to get it or else I wouldn't give it a star because they sent me a used one with a scratched lens and the reticle was completely blurry. I was pi$$ed to say the least until I got my new one. When you pay this amount of money for something I was in awe that they thought that someone wouldn't notice this was used. Anyways this scope deserves every star! Had it sighted in at a 100 yards within 5 rounds. I've wanted one of these for about 8 yrs and it was worth the wait. Very clear, great eye relief, and durable. No complaints about the scope!
- Reviewed in the United States on November 5, 2016I couldn't be happier with this scope. Could you purchase a cheaper scope? Yes. Would it serve your purposes? Possibly. I'm here to tell you that IF the zombie apocalypse comes, this is the scope to have. I hope I society never falls and zombies never come. I hope I can pass this scope along to a friend or loved one at the end of a long uneventful civilian life. So long as you don't try to brain the zombies with it, this honey will last until you and your team are all retired from the zombie extermination. The fact that it uses a radioactive isotope to illuminate the reticle makes it freaking awesome for those pesky EMP's and dirty bombs. No worries about finding batteries or shorting electronics. Just point and shoot, day or night, baby! I love it so much I'm going to get another for my Mossberg bolt action scout rifle. A great hiking rifle I must add. Work hard for that quarterly bonus and pick this puppy up. When everyone else is searching for batteries to power their less expensive sights, you'll be glad you're not the blue plate special. Enjoy!
- Reviewed in the United States on September 11, 2016Great scope, seems durable enough, crystal clear, bright as you would ever need. The green does not get washed out in a jungle environment. Seems to hold its zero and rocks with a mounted RMR.
- Reviewed in the United States on September 5, 2015It's an acog. What more do you need to say. It's worth the money. It's extremely clear. Well made and just plain awesome. Will last longer then the rifle. If you have the money to blow it's worth every penny
- Reviewed in the United States on January 6, 2022This is a Juke scope... and you can't return... Do yourself a favor and buy a Trijicon scope from a local dealer !!
- Reviewed in the United States on October 15, 2012Scope arrived new and undamaged. Now for the bad. Looking through the front I noticed allot of particles clinging to the inside, there are at least 4 or 5 glass or metal flakes clinging to the inside of he objective lens and many on the inside of the housing. Called Trijicon and there response was this is not uncommon because they are "assembled by humans" they did however offer to pay shipping and clean it for free, but I declined since they cannot be seen when looking through the scope as you normally would. I realize they are assembled by humans (as are most high end optics) and our solders in the field would not be cornered with dust, but some retail customers (with good vision) are.
Pros: Rugged, waterproof, simply the best.
Cons: None except for crud on the inside.
- Reviewed in the United States on December 4, 2014It seems the older you get the more you have to spend on optics. So be it. This is a great scope and my only regret is that I did not buy it sooner. Also, I wish for the money that Trijicon had included its quick release mount rather than the standard two thumb screw mount.