Meprolight M21 Day/Night Reflex Sight 30mm Triangle

Description

The Meprolight M21 is a self-illuminated day/night reflex sight engineered for rapid, both-eyes-open target acquisition. It combines a 30 mm viewing window with a triangle reticle and a fiber-optic collector that transitions to a tritium light source at low light, providing illumination without batteries or switches. The sight includes a Picatinny quick-detach mount and a dust cover and is designed to work with magnifiers for extended capability.

Key Specifications

• The magnification is 1x for true reflex, both-eyes-open use.
• The objective lens measures 30 mm in diameter for a large viewing area.
• The reticle type is a Triangle for rapid sight picture acquisition.
• The dot/reticle size is listed as 12 MOA.
• The optic mounts to a PICATINNY footprint with a quick-detach adapter included.
• The construction materials are specified as steel and glass.
• The finish is described as matte black/grey.
• The unit weight is 13.12 oz as provided in the product attributes.
• Illumination is day/night self-illuminated (fiber optic + tritium) and requires no batteries.
• An included dust cover protects the optics during transport and storage.

Compact and maintenance-free, the M21 delivers instant, no-battery aiming for close-quarters and dynamic use while remaining compatible with magnifiers when longer engagement options are needed. Its large 30 mm window and triangle reticle make it well suited for applications that prioritize speed, clear sight picture, and simple, dependable illumination under varying light conditions.