The Meprolight USA M21 Black 1x 30 mm 4.3 MOA Red Dot is a rugged, battery-free reflex sight originally engineered for demanding military use. Its large 30 mm objective lens and true 1x magnification support both-eyes-open shooting, while dual fiber-optic and tritium illumination keep the 4.3 MOA red dot visible in daylight and low light without switches or batteries.

This M21 variant is ideal for carbine and rifle shooters who want fast target acquisition at the range, in training, or for general-purpose duty use. Unlimited eye relief and a generous field of view make it easy to stay aware of your surroundings and track moving targets. Built to MIL-STD-810 durability standards and compatible with night vision devices and magnifiers, it reflects Meprolight’s reputation for robust design and practical innovation.

• Manufacturer: Meprolight
• Model: M21
• Magnification: 1x
• Objective Lens Diameter: 30 mm
• Reticle: 4.3 MOA red dot
• Illumination: Fiber-optic by day, tritium by night
• Eye Relief: Unlimited
• Length: 4.48 in
• Weight: 13.12 oz