Reviews & Ratings for Trijicon TA31RCO-M4 ACOG 4x32 USMC M4 Rifle Scope w/ TA51 Mount &

Trijicon TA31RCO-M4 ACOG 4x32 USMC M4 Rifle Scope w/ TA51 Mount &

$1,679.00 $1,369.00 Save 18%

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Most Helpful Positive Review USMC Trijicon ACOG TA31RCO-M4CP Kit

Upon receiving the USMC selected Trijicon ACOG Kit, I was impressed with the optical & material quality. It was sighted at home on my AR15M4 16" bbl using the down loadable form from Trijicon, then proceeded to the 25 yard plinking range firing two 3 shot groups which only required minor elevation adjustment after which the 100 yard range was visited firing on target requiring no adjustment. The 4X ACOG tritium/fiber optic reticle was bright in both shade and direct sun light it is designed for quick target aquisition and is a joy to use. Based upon that experience, I now plan to purchase the ...
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Great Scope with Marine Corps Heritage

by Greg Sheehan, Verified Owner from FL, United States Written on July 21, 2026

I am very happy with this scope. Compact, Light Weight, easy to mount, very easy to sight in. Perfect for my 16" AR-15.

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TA31 RCO-M4

by Josh, Verified Owner from MT, United States Written on April 2, 2026

It's an ACOG, what else is there to say? They're battle proven to be reliable and durable with crystal clear glass and a wide FOV. The eye relief is short, but nothing a little practice won't get you used to. Great piece to add to a rifle.

Pros:

durable
clear glass
reliable
wide field of view

Cons:

Short eye relief

Best Used for:

Self defense
defense
protection
SHTF

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Love the acog

by Nate, Verified Owner from NC, United States Written on January 12, 2025

Loved using it on my deployments and feels just like it used to. Fast shipping and nicely packaged

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Tough Optic

by ATIHI7, Verified Owner from GA, United States Written on January 6, 2025

I own a couple of these ACOGs and have used them around the world. They are great optics.

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TA31RCO-M4 ACOG

by Tyler, Verified Owner from TX, United States Written on November 6, 2024

USMC ACOG showed up in a timely manner with no issues. The new style ACOGs do come with the rear lugs to piggy back a red dot I hadn’t seen that mentioned in previous reviews

1 of 1 found the following review helpful.

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Great Service

by Monty, from AZ, United States Written on May 11, 2024

As advertised, quick delivery. Very satisfied customer

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The tank of optics!

by Boombostic, Verified Owner from CO, United States Written on April 12, 2024

Super clear glass, nye indestructible, definitely a go to for me!

Best Used for:

Your do everything rifle

1 of 1 found the following review helpful.

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Combat proven

by Dave, Verified Owner from CA, United States Written on March 12, 2024

If you’re reading this then you know what’s up. ACOG/RCO: these things are bullet proof, reliable, work just as needed, and have over two decades of combat under their belts. Despite being considered obsolete, everyone still uses and plans on using these for the foreseeable future so don’t take my word for it. BDC is dead on. The illumination works relative to ambient light so it’s always bright enough to see, even in complete darkness thanks to the power of radiation. That’s right you might even get superpowers if you stare through it long enough. These things will make you feel like you’re clearing the city again with your boys. (Clone builders) or maybe feel like the guy from your favorite GWOT movie. I don’t know. It’s hard to hate on these. Oh, and the only way I can see it happening is if it takes a directly hit from a howitzer, the warranty covers it off it ever breaks!

Pros:

durable
Warranty
great reticle
BDC
no batteries
Super powers

Cons:

Heavy
Bad eye relief

Best Used for:

Any rifle
clone builders
anyone looking for a robust top of the line fixed power scope

1 of 1 found the following review helpful.

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Perfectly rugged and simple

by JM, Verified Owner from NJ, United States Written on March 6, 2024

This RCO model includes the flash hider and mount. Got it with the red chevron, which in my opinion works reasonably well for close shots once you've practiced on it if you don't have access to a mounted red dot. I ended up buying a rear-shifting mount to help with eye relief given the fixed stock I have to have in NJ. Thought about the TA02 but liked the lower weight of this option.

If this is your first ACOG you will be impressed by the build quality. Recommend learning about how to use the range estimation and BDC features of the reticle. Nothing is without compromises, but well worth the money.

Pros:

Lightweight
clear glass
easy to use
rugged
Unmatched quality
Lots of light gathering ability
don't have to worry about batteries

Cons:

eye relief can be tricky
not the cheapest solution

Best Used for:

a light weight build for targets out to 300-400 meters

1 of 1 found the following review helpful.

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Best M4 scope!

by Bob, from CA, United States Written on March 1, 2024

Tough, accurate, reliable, battle proven, calibrated for the ammo and carbine system!

Pros:

Durable and reliable.

Cons:

Fixed power.

Best Used for:

Military, police, and self-defence.

Was it helpful to you? Yes | No

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Reviews & Ratings for Trijicon TA31RCO-M4 ACOG 4x32 USMC M4 Rifle Scope w/ TA51 Mount & — 70 reviews — Page 1