Truglo TG8429B XR 20x18mm 3 MOA Red Dot Sight - Black

The Truglo TG8429B XR is a compact 3 MOA red dot sight built for shooters who want a reliable, affordable optic on their carry gun or duty pistol. This 20x18mm reflex sight mounts directly to RMR-compatible optic-ready slides and features a clean, fast-acquisition dot that works in daylight and dim light alike. Truglo engineered the XR to be lightweight and durable without the premium price tag of competitors—making it a solid choice for everyday carry, home defense, or range work where you want your point-of-aim dialed in without fuss.

The 3 MOA dot provides good balance between precision and speed: large enough to pick up quickly in a fight, precise enough for accurate shooting at intermediate distances. Ten brightness settings and a motion-sensing wake feature mean the optic activates when you draw and stays dark when it's holstered, preserving battery life. You also get the convenience of auto-brightness memory—the sight remembers your preferred setting each time you power it back on, so you're not fumbling with controls in the moment.

Build quality is serious here: the sight is machined from aircraft-grade aluminum and sealed to IPX7 waterproof standards, so it handles rain, sweat, and holster carry without complaint. Windage and elevation adjustments are 1 MOA per click, giving you the fine-tuning you need to dial in a perfect zero. Unlimited eye relief means there's no head position requirement—shoot with any grip, any stance. A Picatinny rail mount ships with the sight, and the included CR1632 battery runs for 20,000+ hours, so you'll replace it far less often than you'd expect.

This is a red dot sight for the shooter who values reliability and value. Mount it, zero it, trust it, and move on to what matters—the actual shooting.

Key Features

• 3 MOA red dot reticle for fast target acquisition
• Compact 20x18mm footprint fits RMR-optic-ready pistols
• 10 brightness settings with auto-memory of your last selection
• Motion-sensing wake feature activates when drawn, conserves battery when stored
• 1 MOA windage and elevation adjustments for precise zeroing
• Aircraft-grade aluminum construction with CNC precision machining
• Unlimited eye relief—shoot from any position or stance
• IPX7 waterproof rating handles weather and heavy use
• 20,000+ hour battery life (CR1632 included)
• Auto-shutoff after 4 minutes of inactivity extends battery lifespan
• Picatinny rail mount included; compatible with RMR-cut optic-ready slides

Specifications

Frequently Asked Questions

What pistols does the Truglo TG8429B XR mount on?

The XR is designed for RMR-optic-ready slides. It includes a Picatinny rail mount for standard rail systems. Check your pistol's manual to confirm it has an RMR cut or Picatinny rail before purchasing.

How long does the battery last?

The CR1632 battery included with the sight is rated for 20,000+ hours of continuous use. The auto-off feature powers down the optic after 4 minutes of inactivity, so in real-world carry your battery life will be even longer.

What size is the red dot reticle?

The reticle is 3 MOA, which at 100 yards equals roughly 3 inches. This size strikes a balance between speed (quick to find and track) and precision (small enough to aim carefully).

Is the TG8429B waterproof, and can I leave it on in rain?

Yes, the sight is sealed to IPX7 waterproof standards and is safe in heavy rain and submersion. The auto-shutoff feature and motion sensing also help preserve battery when the gun is holstered.