Trijicon ACOG 4x32mm BAC Rifle Scope - Green Illuminated Crosshair BDC Reticle

All Trijicon optics
Trijicon ACOG 4x32mm BAC Rifle Scope - Green Illuminated Crosshair BDC Reticle - Optic - view 1
Trijicon ACOG 4x32mm BAC Rifle Scope - Green Illuminated Crosshair BDC Reticle - Optic - view 2
Trijicon ACOG 4x32mm BAC Rifle Scope - Green Illuminated Crosshair BDC Reticle - Optic - view 3
Trijicon ACOG 4x32mm BAC Rifle Scope - Green Illuminated Crosshair BDC Reticle - Optic - view 4
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Trijicon

Overview

The Trijicon ACOG 4x32mm BAC Rifle Scope is a fixed power prism scope designed to provide a 4X magnification for enhanced target acquisition at medium ranges. With a 32mm objective diameter and a 0.31 inch exit pupil, it ensures a bright and clear view, while the 1.50 inch eye relief allows for comfortable shooting without sacrificing visibility. The BDC reticle is illuminated in red, making it suitable for low-light conditions and compatible with night vision devices, which is particularly valuable for tactical applications. This scope is commonly found on pistol builds chambered in 5.56 NATO, where quick target engagement is essential.

Specifications

MPNTA31-CH-G
ReticleBDC
Magnification4x
IlluminatedYes
Eye Relief1.50 in
Moa Adjustment1/2 MOA
Scope TypeFixed
Objective Diameter32mm
Night Vision CompatibleYes
Exit Pupil Diameter0.31 in

Available Merchants(5)

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MidwayUSA logo
MidwayUSA
Free shipping
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In Stock
$1,146.99
Optics Planet logo
Optics Planet
Free shipping
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$1,149.00
KY Gun Company logo
KY Gun Company
Flat rate shipping
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$1,159.61
Palmetto State Armory logo
Palmetto State Armory
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$1,206.99
BattleHawk Armory logo
BattleHawk Armory
Shipping varies
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$1,277.00

October 2026 on GunPartPicker

Trijicon ACOG 4x32mm BAC Rifle Scope - Green Illuminated Crosshair BDC Reticle ranked #110 of the 220 optics builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #69 of the 588 optics builders have added. Builds with this optic are mostly chambered in 5.56 NATO (60%, then .308 Win 10%), split between carbine-length (50%) and mid-length (25%) gas systems, and mostly AR-15 (86%).

Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today all 5 retailers we track have it in stock. It dipped to $1,146.99 at MidwayUSA for a stretch in October 2026, well under its usual $1,277, so sales do come around. Buying today, the lowest price is $1,146.99 at MidwayUSA, which matches the best price we saw in October.

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Frequently Built With

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

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

85.7%
AR-1585.7%
AR-107.1%
AR-97.1%

Caliber

60%
5.56 NATO60%
.308 Win10%
300 Blackout10%
7.62x51 NATO10%
9mm10%

Gas System

50%
Carbine50%
Mid-Length25%
Rifle25%

Builds Featuring This Part

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Builds in the community that include the Trijicon ACOG 4x32mm BAC Rifle Scope - Green Illuminated Crosshair BDC Reticle

BuildPartsTotal
For 2 gun 18" build
For 2 gun 18"
26$2929.65

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