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Shield Sights OMSsc 4MOA Glass Edition OMSSC-4MOA-GLASS (Open Mini Sight Sub Compact – 4 MOA Glass).
This is the 4 MOA variant of Shield Sights' innovative micro red dot, designed specifically for micro-compact pistols using the Shield/RMSc footprint. Like the 8 MOA version, it features a revolutionary translucent acrylic roof combined with a true crystal-clear glass lens — a world-first design that delivers an unobstructed panoramic sight picture, superior light transmission to the photodiode for more accurate automatic brightness control, and a brighter, clearer reticle without colored tints or filters.
Key Features & Specs
- Reticle: 4 MOA red dot — smaller and more precise than the 8 MOA option, making it excellent for faster target acquisition with slightly better precision at defensive distances (7–25 yards) while still being fast enough for most concealed carry scenarios.
- Lens: Square-shaped, crystal-clear glass lens with hard anti-reflective, color-free coating (no magnification, no parallax). The translucent acrylic roof allows more ambient light to reach the sensor and provides a truly open, unobstructed field of view unlike traditional hooded or enclosed micro dots.
- Brightness: Fully automatic adjustment (always-on design with no manual buttons). Night-vision compatible.
- Battery: Bottom-loading CR1632 3V lithium coin battery. Typical runtime: ~9,000 hours (approximately 1 year of average daylight use).
- Construction: Aerospace-grade 6082-T6 aluminum body with matte black finish and translucent acrylic roof. Extremely rugged, lightweight, and low-profile.
- Footprint: Shield/RMSc (direct fit on most micro-compacts like Sig P365 series, Glock 43X MOS, Springfield Hellcat, etc.).
- Durability: IP67 waterproof and dustproof (submersible to 1 meter for 30 minutes). Shockproof for hard daily carry.
- Dimensions (sight only): 1.60" L × 0.75" W × 0.85" H (40.8 mm × 19 mm × 21.5 mm).
- Weight: 14.7 grams / 0.51 oz (without battery) — one of the lightest true-glass micro red dots available.
- Additional: Low bore axis for natural point of aim. No radioactive materials. Parallax-free.
The 4 MOA dot is generally preferred by users who want a bit more precision without sacrificing speed, while the innovative roof design gives a cleaner, more "open" sight picture than standard micro dots. Reviewers highlight the crisp glass clarity, minimal added bulk/weight for concealed carry, fast target transitions, and overall durability despite the tiny size.
4 MOA vs 8 MOA (Same Glass Edition)
- 4 MOA (this model): Smaller dot for slightly better precision and a less "bloated" sight picture at closer ranges.
- 8 MOA: Larger, faster-acquiring dot — often favored for pure defensive speed or older eyes.
Both share identical dimensions, weight, housing, battery life, and features.
Who It's For
- Concealed carry users with micro-compact pistols who want the smallest, lightest possible red dot without compromising on glass clarity or innovation.
- Defensive shooters prioritizing a natural, unobstructed sight picture and automatic brightness.
- Anyone seeking a premium "always-on" micro optic with the unique translucent roof technology.
