Feyachi Reflex Sight – Adjustable Reticle (4 styles) Both Red and Green in one sight!

Some customer feedback:"The sights are blurry,and it shows double images."Please don't worry,It just need 3-5 minutes to preheat when you first time to use it.(Just open and let it stay for 3-5 minutes).Then it will show clearly.If it still...