The Meprolight M21 1x30mm Day/Night Self‑Illuminated Reflex Sight with 5.5 MOA dot is a rugged, battery‑free optic trusted by professionals around the world. Using a large 30 mm objective lens and dual fiber‑optic and tritium illumination, it delivers a crisp aiming point in bright daylight or low‑light conditions without switches or external power. The integrated quick‑detach Picatinny mount keeps the sight low and stable on the rifle while allowing fast removal when needed.

This M21 variant with the 5.5 MOA dot reticle is optimized for rapid target acquisition at typical carbine distances, making it well suited for general range use, training, and practical competition where speed matters more than extreme precision. Unlimited eye relief and a generous field of view support shooting with both eyes open for better awareness. Built to demanding military standards, the Meprolight M21 reflects the manufacturer’s focus on durable, dependable optics that perform in demanding environments.

• Manufacturer: Meprolight
• Model: M21
• Magnification: 1x
• Objective: 30 mm
• Dot Size: 5.5 MOA
• Reticle: 5.5 MOA dot illuminated
• Eye Relief: Unlimited
• Field Of View: Unlimited
• Mount Type: Picatinny quick detach
• Power Source: Fiber optic / tritium (no batteries)
• Weight: 13.12 oz
• Length: 4.48 in
• Finish: Black