Description
The Trijicon 2×20 Compact ACOG is the answer for anyone running a short, fast rifle or pistol-caliber build who still wants real Trijicon glass up top. This model wears the Red 55gr .223 RTR reticle, tuned specifically for 55-grain .223 loads, and it comes bundled with the Q-LOC mount so you can bolt it to any Mil-Spec or NATO Picatinny rail right out of the box. The 2x fixed magnification hits a sweet spot for smaller platforms, giving you enough reach to detect and identify targets at distance while staying quick and forgiving up close.
What Sets the 2×20 Compact ACOG Apart
Like the ACOG family it comes from, this optic runs on tritium and fiber optics instead of batteries. The fiber optic pulls in ambient light to brighten the reticle during the day, and the tritium keeps it glowing in total darkness, so the aiming point is always lit without you touching a thing. That dual-illumination setup is what lets you shoot with both eyes open using the Bindon Aiming Concept, which keeps your situational awareness high in fast-moving situations.
Built Like an ACOG Should Be
The forged aluminum housing is nitrogen-filled and waterproof, and the fixed-power design means fewer moving parts and fewer things to break. ACOGs have earned a reputation for shrugging off recoil and holding zero through serious round counts, and this compact version carries that same DNA. Adjustments run at 1/2 MOA per click for dialing in your point of impact.
Why the Q-LOC Mount Matters
The included Q-LOC mount is a genuinely slick piece of engineering. It's a Mil-Spec drop-test-rated 6061-T6 aluminum unit with a tool-less, one-handed clamping system, and the spring-loaded design keeps constant tension on the rail. That means it stays put and returns to zero even if the knobs aren't fully cranked down, which is a nice bit of insurance when you're switching optics between rifles.
Key Specifications
- Manufacturer: Trijicon
- Model: 2×20 Compact ACOG (TA47)
- Manufacturer Part Number: TA47-C-400414
- UPC: 719307624733
- Magnification: 2x fixed
- Objective Diameter: 20mm
- Reticle: Dual Illuminated Red 55gr .223 RTR
- Illumination Source: Fiber Optics & Tritium (battery-free)
- Bullet Drop Compensating (BDC): Yes
- Bindon Aiming Concept (BAC): Yes
- Adjustment: 0.5 MOA per click
- Housing Material: Forged Aluminum
- Finish: Matte Black
- Mount: Trijicon Q-LOC Technology Mount
- Color: Black
What’s Included
- Trijicon 2×20 Compact ACOG (TA47-C-400414)
- Trijicon Q-LOC Technology mount
- Manufacturer documentation
Frequently Asked Questions
Does the 2×20 Compact ACOG need batteries?
No, it runs entirely battery-free. The reticle is lit by a combination of fiber optics during daylight and tritium in low light or total darkness, so the aiming point is always illuminated. There's nothing to charge, replace, or forget to turn off.
What is the Red 55gr .223 RTR reticle designed for?
The RTR reticle on this model is calibrated for 55-grain .223 loads, which is one of the most common AR-15 and .223 rifle rounds out there. The bullet drop compensating design gives you holdover references so you can stay on target as distance increases. It pairs naturally with carbines and compact rifles running that ammo.
What kind of rifles does the 2×20 Compact ACOG work best on?
This optic shines on shorter, space-limited platforms like compact ARs, pistol-caliber carbines, and subguns such as UZI, H&K, or MP-5 style builds. The 2x fixed magnification keeps things fast up close while still letting you reach out and identify targets. The compact footprint means it doesn't hog rail space.
How does the included Q-LOC mount attach?
The Q-LOC mount uses a tool-less, one-handed clamping system that snaps onto any Mil-Spec or NATO Picatinny rail in seconds. Its spring-loaded design keeps constant tension so it maintains zero even before you fully tighten the knobs. That also makes it easy to move the optic between rifles with reliable return to zero.





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