Trijicon ACOG Flattop Mount for MIL STD Rails, Black - TA51

Trijicon ACOG Flattop Mount for MIL STD Rails, Black - TA51 - Optic Mount - view 1
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Trijicon

Overview

The Trijicon ACOG Flattop Mount is designed specifically for MIL STD Picatinny rails, providing a stable and secure mounting solution for your Trijicon ACOG optic. Its robust construction ensures that your optic remains firmly in place, which is crucial for maintaining zero during use. This mount is commonly found in builds featuring a mid-length gas system and chambered in 5.56 NATO, making it a practical choice for those looking to enhance their AR-15's performance.

Specifications

MPNTA51
Mount TypeScope Mount
ColorBlack
Optic CompatibilityTrijicon ACOG
Mounting InterfacePicatinny

Available Merchants(6)

Prices checked

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KY Gun Company logo
KY Gun Company
Flat rate shipping
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In Stock
$63
Palmetto State Armory logo
Palmetto State Armory
$9.99 shipping (free over $99)
Shipping Speed
In Stock
$65
MidwayUSA logo
MidwayUSA
Free shipping over $100
Shipping Speed
In Stock
$68
BattleHawk Armory logo
BattleHawk Armory
Shipping varies
Shipping Speed
In Stock
$68
Optics Planet logo
Optics Planet
Free shipping
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In Stock
$80
Brownells logo
Brownells
Free shipping over $99
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Out of Stock
$60

August 2026 on GunPartPicker

Trijicon ACOG Flattop Mount for MIL STD Rails, Black - TA51 ranked #33 of the 114 optic mounts builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since April 2026. All time, it ranks #31 of the 293 optic mounts builders have added.

Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 5 of the 6 retailers we track have it in stock. The best price drifted down from $61.99 to $59.99 over August 2026 without a real sale. Buying today, the lowest price is $63.31 at KY Gun Company, above August's low of $59.99, so a better deal may come back.

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Frequently Built With

The part most often added in each category by the 5 builds that include this one

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

85.1%
AR-1585.1%
AR-1012.7%
AR-92.2%

Caliber

72.9%
5.56 NATO72.9%
.223 Wylde9.9%
.308 Win8.1%
300 Blackout3.2%
9mm1.1%
Other5.2%

Gas System

52.8%
Mid-Length52.8%
Carbine30.7%
Rifle13.3%
Pistol3.2%

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