Probably the best red dot for the price due to features and trijicon rmr mounting footprint. - Holosun HE507C 2 MOA Dot & 32 MOA Circle Reflex Red Dot Sight

So happy to have found this red dot while googling for the cheapest Trijicon RMR RM04 I could find. Wasn't willing to pay more than $350 since that's what a friend paid for, here on OpticsPlanet. Not sure when he got it but prolly a few years ago.

The features on this red dot alone, my personal opinion FOR THE PRICE, out-weigh the features on the Trijicon RMR RM04. But then again, both have advantages against each other when it comes to their features as their features are not similar; you may consider a feature an advantage/disadvantage, and vice versa, one over the other. The Trijicon RM04 features a fiber optic and Tritium illumination whilst the Holosun 507C features ADJUSTABLE battery and solar illumination WITH THE ADDITION of changing either circle or dot AND illumination adjustment.

Oh, did I mention the Holosun 507C has 10k hrs of battery life and auto's on when the sight notices movement because it does, and it works. The down side is that the sensor that noticed the movement is kiond of sensitive, so if you have it on your person or your carrying, it will be on. But, if it's in safe, sitting right next to you, under your pillow, in your glove box, on your gun stand/rack, it will remain off until it senses it has been moved.

With each red dot having different features and none of which feature any similarity in terms of features other than the Trijicon RMR mounting footprint you really cant go wrong either either one unless you are relying/wanting a certain feature; kinda like when you go to an event/hall and you have to choose appetizer then either fish/chicken/beef as the main coarse and in the end everyone has the same dessert.

The big advantage OVERALL ADAVANTAGE I can see from the Holosun over the Trijicon is the price and the MOA. The Holosun 507c is advertised as 1MOA and the Trijicon RM04 is 7MOA. So right off the bat, the Holosun has the advantage of price and MOA.

Since the Holosun 507C has the same Trijicon RMR mounting footprint, and if you just so happen to have a slide or upper that is cut for Trijicon RMR's, then the Holosun 507C fits right on there, no gaps, hella flush.

SO if anything it's up to you on what you want on features. Happy shooting and fight for your gun rights!!!!