Feyachi M37 Variable 1.5–5X Red Dot Magnifier — 37mm Height, Flip-to-Side Mount, Focus-Adjustable

The Feyachi M37 1.5X–5X is a flip-to-side variable magnifier that adds clear, adjustable magnification behind your 37mm-height red dot while preserving a wide field of view.

The M37 magnifier from Feyachi is designed to pair with compatible red dot sights to extend target identification and precision without forcing you to switch optics. Built with a focus adjustable eyepiece, multi-coated glass, and a quick flip-to-side mount that supports Absolute co-witness, this unit aims to balance magnification range, eye relief comfort, and ruggedness for field use. It requires a 37mm center height from the rail to the red dot optic and is ideally used alongside Feyachi red dots or any sight matching that height.

How much magnification and eye relief does the M37 provide?

The magnifier offers a variable zoom from 1.5X to 5X so you can dial-in closer views at different distances. Eye relief stays comfortable across the range, allowing faster target acquisition without extreme head positioning.

• Variable magnification: 1.5X to 5X for flexible use
• Eye relief approximately 2.2–3.6 inches to maintain a broad field of view
• Smooth zoom range to adjust for mid- to longer-range observation

How do I keep the image sharp and aligned with my red dot?

The M37 has a focus-adjustable eyepiece for fast sharpening of the viewed image, plus windage and elevation adjustments to center the optic with the red dot. These controls let you fine-tune the view so the magnified image aligns reliably with the aiming point.

• Eyepiece focus for quick clarity adjustments
• Adjustment screws for windage and elevation centering
• Maintains color fidelity and detail with fully multicoated lenses

What mounting and durability features does the magnifier include?

The unit ships with a flip-to-side mount engineered for fast transition between magnified and standard red dot use; a single button flips the magnifier aside. The main body is machined from hard-coat-anodized aluminum for impact resistance and long service life in demanding conditions.

• Flip-to-side mount for quick on/off use supporting Absolute co-witness
• Button-activated side flip for fast transitions
• Hard-coat-anodized machined aluminum housing for toughness

Which red dots are compatible with the Feyachi M37?

The M37 is built to work seamlessly with all Feyachi red dot sights and other manufacturers' dots that share a 37mm center height from the rail. Before buying, verify the height of your red dot to ensure proper alignment and function.

• Compatible with Feyachi red dots and any 37mm center-height sight
• Designed for Absolute co-witness setups with appropriate mounts
• Check firearm and sight dimensions to confirm fitment

Who this is for: The Feyachi M37 1.5X–5X magnifier suits shooters who want flexible, on-demand magnification behind a red dot without swapping optics. It’s aimed at tactical and recreational users needing faster target ID at extended ranges, those who run co-witness setups, and anyone seeking a rugged, focus-adjustable magnifier that flips out of the way when not required. Verify rail and red dot center height compatibility before purchase to ensure smooth integration.