The Shield Sights OMSX Open Mini Sight XL Red Dot with a 4 MOA glass lens (Shield Sights part no. OMSX4MOAGLASS) is a next-generation micro red dot built for shooters who want a tighter, more precise aiming point for defensive or competitive pistol work. Shield Sights expanded the OMSX’s lens area by 80 percent over its standard Mini-Sight range, using an octagon-shaped, crystal-clear glass lens and a translucent roof architecture that leaves almost nothing blocking the sight picture. The tight 4 MOA dot suits shooters who prioritize precision over a fast, large aiming reference.

Key Specifications

• A tight 4 MOA red dot reticle favors precise aiming over a larger, faster dot.
• An octagon-shaped glass lens delivers a true-to-color, distortion-free sight picture with no polymer filtering.
• The XL lens area is 80 percent larger than Shield’s standard Mini-Sight range, opening up the field of view.
• A translucent roof architecture leaves the sight picture almost completely unobstructed.
• Compact footprint measures 1.80 in. long and weighs just 0.38 oz, adding almost no weight to the slide.
• Runs on a single CR2032 battery for simple, widely available power.
• Mounts to Shield’s own patented footprint, which enables co-witnessing with standard iron sights.
• Finished in matte black to match most duty and carry pistols.

Frequently Asked Questions

What dot size does this model use? This version uses a 4 MOA dot, the tightest option in the OMSX Glass lineup, alongside 8 MOA and 65/2 MOA dual-reticle options.

Can it co-witness with iron sights? Yes, Shield’s patented mounting footprint is designed to allow co-witnessing with standard iron sights.

What battery does it use? A single CR2032 battery powers the sight.

Buy the Shield Sights OMSX Open Mini Sight XL Red Dot, 4 MOA Glass

Get a precise, glass-lens micro red dot for defensive or competitive carry. Order the Shield Sights OMSX 4 MOA from our Lubbock, Texas gun shop, part of our red dot sights lineup, for fast, insured shipping.