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Trijicon
Overview
The Trijicon ACOG 4x32mm Dual Illuminated Crosshair .223 BDC Ballistic Red Rifle Scope is a fixed power scope designed for precision shooting. With 4X magnification and a 32mm objective diameter, it provides a clear and bright sight picture, while the BDC reticle offers ballistic compensation for .223 ammunition, ensuring accurate shooting at various distances. This scope is commonly found on mid-length gas system builds chambered in 5.56 NATO, making it ideal for both tactical and competitive applications.
Trijicon ACOG 4x32mm Dual Illuminated Crosshair .223 BDC Ballistic Red Rifle Scope w/ RMR - 100550
Trijicon ACOG 4x32mm Dual Illuminated Crosshair .223 BDC Ballistic Red Rifle Scope w/ RMR - 100550 ranked #21 of the 105 rifle scopes builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #14 of the 309 rifle scopes builders have added. Builds with this rifle scope are mostly chambered in 5.56 NATO (75%, then .223 Wylde 13%), split between mid-length (43%) and rifle-length (36%) gas systems, and mostly AR-15 (94%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 5 retailers we track have it in stock. It dipped to $1,775.33 at BattleHawk Armory for a stretch in August 2026, under its usual $1,841.10 to $1,914.99, so sales do come around. Buying today, the lowest price is $1,775.33 at BattleHawk Armory, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every rifle scope by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Rifle Scope Guide →Check it against the live catalog:
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Trijicon ACOG 4x32mm Dual Illuminated Crosshair .223 BDC Ballistic Red Rifle Scope w/ RMR - 100550
| Build | Parts | Total |
|---|---|---|
 | 24 | $3783.45 |
 | 24 | $6524.39 |
 | 30 | $7804.34 |
 | 11 | $3805.45 |
 | 14 | $2924.95 |
1 global rating
Top reviews
Trijicons ACOG 4x32 with the BDC reticle is the duty optic that earned its reputation. Removed and reinstalled three times during a class, zero never shifted. The piggyback RMR is a useful close range option. Battery free thanks to tritium fiber illumination.
