Sightmark Core Shot A-Spec FMS Reflex Sight 1x28x18, 5 MOA Red Dot, Picatinny Mount, Matte Finish

The Sightmark Core Shot A-Spec FMS Reflex Sight is a compact red dot for shooters who want a mid-size platform that splits the difference between ultra-minimal and full-frame designs. Built on an aluminum 6061-T6 housing, this 1x28x18 reflex sight weighs just 4.4 ounces and delivers a 5 MOA red dot reticle with 8 brightness settings plus night vision compatibility. Whether you're running it on an AR platform or any Picatinny rail, the Core Shot's external battery compartment keeps CR2032 battery swaps quick and field-friendly—you're looking at 20 to 1,400 hours of runtime depending on brightness.

Compact reflex sights live and die on durability, and the Core Shot meets that standard. It's shockproof to 4 feet, rated IP55 for water resistance, and engineered to handle the recoil signature of .50 BMG. The optical package includes AR lens coating to minimize glare, and the unlimited eye relief means you can shoot it with any cheek weld or head position. Elevation and windage both offer 100 MOA of adjustment room, so zero work won't be a headache.

The A-Spec FMS designation signals Sightmark's attention to field-tested performance in both recreational and competitive shooting environments. If you're looking for a tough, no-fuss reflex sight that won't slow you down or break the bank, the Core Shot bridges the gap between budget and premium without the bloat.

Key Features

• 5 MOA red dot reticle with 8 brightness levels and night vision settings
• Lightweight aircraft-grade aluminum body at just 4.4 ounces
• External battery compartment for tool-free CR2032 access in the field
• 100 MOA elevation and windage adjustment
• IP55 water resistance and shockproof to 4 feet
• Unlimited eye relief for flexible shooting position
• Picatinny mount compatible with AR and most modern platforms

Specifications

Frequently Asked Questions

What mounts does the Core Shot A-Spec fit?

The Core Shot comes with a Picatinny mount, so it'll work on any AR, shotgun, handgun, or rifle with a Picatinny rail. It includes a riser mount optimized for AR platforms.

How long does a battery last?

Battery life ranges from 20 to 1,400 hours depending on which brightness level you run. The sight uses a CR2032 battery, accessible via an external compartment—no tools required for field swaps.

Can I use this with night vision?

Yes. The brightness settings include NV 1–2 levels designed to be compatible with night vision devices.

Is the Core Shot fogproof or nitrogen-filled?

The Core Shot is not nitrogen-filled and is not fogproof. It is water-resistant to IP55 and shockproof, but internal fogging is possible in extreme temperature swings. It's best suited for standard hunting and shooting conditions.