Blows any other 1x optic out of the water, don't look any farther you've found the best. - Holosun HE510C Elite 1x 2MOA Reflex Green Dot Sight

This is the perfect 1x optic. It's rugged, easy to use, lightweight and has an insane battery life. Honestly it's just perfect and I can't say much more than that. I have one on my MP5 clone and a second on my HK93 clone. On the MP5 clone I put round after round in the same hole on paper and it's an awesome feeling to do so, same with the 93 clone.