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UTG ACCU-SYNC 2521R Red Dot Sight - 3 MOA Single Dot OP-DS2521R



3 MOA Red Dot

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UTG ACCU-SYNC 2521R Red Dot Sight - 3 MOA Single Dot OP-DS2521R

UTG® ACCU-SYNC dot sights come in a compact and subcompact size and feature a red illuminated 3 MOA dot with 8 manually adjusted brightness intensity settings to choose from. Illumination memory conveniently gets users right back to the last brightness setting used upon activation. Fully sealed, ACCU-SYNC dot sights are IPX7 waterproof rated and constructed from matte black anodized 6061-T6 aluminum. Optimized for low power consumption and powered by a single CR2032 battery, a 30,000+ hour battery life (at middle brightness) comes standard.

The mounting base uses the common mini footprint and is configured for a lower 1/3 co-witness out of the box. Removing the included riser drops the height down to that of a low mount providing users two commonly used height profiles for different firearm applications. In addition, the base features squared recoil stops and our QR (quick release) mount, making for a quick installation and removal, reliable return to zero, and is compatible with Picatinny rails with widths that may even be out of spec. Tool-free tension adjustment is locked in place via a gear and spring-loaded locking lever interface, allowing users to set it once and forget it.


  • Length (in): 2.66
  • Width (in): 1.67
  • Height (in): 2.69
  • Total Mounting Space (in): 1.27
  • Total Mounting Space (mm): 32.26
  • Window Size (in): 0.79
  • Window Size (mm): 20
  • Center Height (in): 1/3 Co-witness: 2.74 | Low Mount: 2.20
  • Center Height (mm): 1/3 Co-witness: 69.60 | Low Mount: 55.88
  • Warranty: Lifetime
  • Materials: 6061-T6 Aluminum
  • Color(s): Black
  • Surface Finish: Anodized
  • Quick-detachable: Yes
  • Parts Included: Cleaning Cloth, CR2032 3V High Energy Lithium Battery, Hex Wrench 3mm, M5x0.8-5mm Length Button Head Screw,, Neoprene Dot Sight Cover, Optics User Manual, T25 Torx Wrench, W/E Adjusting Wrench
  • Waterproof Rating: IPX7
  • Operating Temperature High (⁰F): +160
  • Operating Temperature High (⁰C): +70
  • Operating Temperature Low (⁰F): -40
  • Operating Temperature Low (⁰C): -40
  • Illumination Toggle Type: +/- Digital
  • Brightness Settings: 8
  • Brightness Mode(s): Manual
  • Battery Type: CR2032 3V
  • Battery Life (hrs): 30,000
  • Battery Loading    Right: Side Turret
  • Click Value @ 100 Yards: 1 MOA
  • Eye Relief: Infinity
  • Parallax (yds): Infinity
  • Parallax (m): Infinity
  • Lens Materal: Glass
  • Mounting Space (in): 1.78
  • Mounting Space (mm): 45.212
  • Mount to Rail Torque Value (in-lb): 25
  • Weight: 6.7 oz / 189g


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UTG ACCU-SYNC 2521R Red Dot Sight - 3 MOA Single Dot OP-DS2521R

UTG ACCU-SYNC 2521R Red Dot Sight - 3 MOA Single Dot OP-DS2521R

3 MOA Red Dot

Write a review