Burris Optics 300235 Fastfire Iii 3-Moa Red-Dot Reflex Sight (No Mount)

Waterproof Red Dot Reflex Sight 
FastFire sights are light small and tough placing a powerful bright red dot on your target. They’re perfect as a primary sight or paired on top of an existing optic or laser. The electronics and chassis are built tough to handle the abuse of competition and hunting. All FastFire sights are waterproof and shockproof and covered by the Forever Warranty. A wide variety of mounting options let you equip your favorite rifles and pistols with a fast-action FastFire.

The FastFire III models are available with either a 3 MOA or 8 MOA dot size and gives you three manual brightness settings as well as an automatic brightness setting. Top mounted battery provides easy access without removing the sight. Upgraded windage and elevation adjustments are easy and accurate.