The Holosun 407C open lens red dot sight features a 6 MOA red dot reticle with RMR/SRO standard footprint compatibility for versatile mounting options.Holosun 407C Red Dot Optic6 MOA dot size for fast target acquisitionOpen lens design for unlimited field of viewRMR/SRO standard footprint mounting patternCR2032 battery power sourceBlack matte finishCompact 2.44-inch length 4.37 oz weightMount not includedIdeal for pistol applications requiring rapid target engagement with excellent durability and reliability for tactical competition or personal defense use.