The Meprolight MicroRDS Kit is only mounting solution to have quick mount and dismount without having to re-zero the pistol. Now almost every pistol can use a red dot optic without the need to drill and tap mounting holes on barrels or slides. The adaptor mounts directly to a Meprolight Tru-Dot, self-illuminated sight which also functions as a back-up sight should the shooter want to remove the red dot optic. It can be placed back on the gun without having to re-zero the sight. The small durable yet lightweight pistol optic features a 3.0 MOA red dot which allows for quick target acquisition. The large sight window provides greater FOV with both eyes open in any lighting condition: day, low-light or nighttime. Set includes Optic, QR Adaptor and backup night sights kit.