The GPO SPECTRA Pistol Dot 1x20i (Model: RD120) is a compact, ultra-lightweight micro reflex sight engineered for rapid both-eyes-open target acquisition on handguns, carbines, and optics-ready platforms. Featuring a true 1x magnification and a 22 mm × 16 mm objective window coated with GPObright™ multi-coating, the sight projects a crisp 3 MOA red dot. It utilizes button-free automatic ambient photo-sensors for reticle brightness management and incorporates a motion-activation sensor with a 1-minute idle shutoff, delivering up to 40,000 hours of runtime from a single CR1632 3V lithium coin cell. Built to Shield RMS/SMS and DeltaPoint Pro footprint standards, it includes a removable low-profile Picatinny rail adapter and has been tested to withstand over 10,000 rounds of .40 S&W slide recoil.

Key Features

• Side-Loading Battery Tray: Houses a single CR1632 coin cell accessible from the side of the optic body, allowing battery replacement without removing the sight or losing firearm zero.
• Intelligent Illumination and Power: Photo-sensor automatically adjusts the 3 MOA reticle intensity to surrounding light levels, paired with motion-sensing instant-on functionality.
• Integrated Backup Iron Sight: A rear-profile notch built into the housing allows co-witnessing with standard-height front pistol sights in the event of battery exhaustion.
• Rugged Weatherproof Construction: Enclosure achieves an IPX7 waterproof rating, protecting internal electronics when submerged in up to 1 metre of water for 30 minutes.
• Tactile Adjustments: Features 60 MOA of total elevation and windage adjustment range for zeroing across various calibres and platforms.

Specifications

• Magnification: True 1x
• Objective Lens Dimensions: 22 mm × 16 mm
• Reticle: 3 MOA Red Dot
• Adjustment Range: 60 MOA total elevation and windage
• Footprint Standard: Shield RMS / SMS / DeltaPoint Pro direct footprint (includes low-profile Picatinny base)
• Power Source: 1 × CR1632 3V lithium battery
• Battery Life: Up to 40,000 hours
• Dimensions: 40.6 mm (L) × 27.0 mm (W) × 23.0 mm (H)
• Weight: 21.0 g to 22.0 g (bare optic)
• Waterproof Rating: IPX7 (1 metre immersion for 30 minutes)
• Recoil Rating: Tested to 10,000+ rounds of .40 S&W

Who is the GPO SPECTRA Pistol Dot 1x20i for?

• IPSC and Steel Challenge handgun competitors — Delivers fast target transitions via a 3 MOA red dot and a 22 mm × 16 mm objective window, adding only 21.0 g to 22.0 g of reciprocating slide weight to preserve cycling dynamics.
• Optics-ready pistol shooters — Provides continuous slide-mounted aiming with a side-loading tray that prevents zero shift across its 60 MOA total travel range while offering up to 40,000 hours of runtime on a single cell.
• Carbine and rifle shooters — Functions as an ultra-compact secondary micro reflex sight using the included low-profile Picatinny mount to maintain a negligible 21.0 g to 22.0 g footprint on primary weapon rails.

Less suitable for: Target distances exceeding 50 to 100 metres or precision hunting requiring target identification; a magnified prism optic, LPVO (1–6x or 1–8x), or standard riflescope is recommended for those applications.