Tactical magnifiers are a great addition to your holographic sight. US military as well as most law enforcement tactical teams utilize tactical magnifiers as part of their standard setup. Most high end magnifiers offer flip-over capability whereby you can flip the magnifier to the side when not needed without detaching it from the mount. This ensure that your entire optical setup remains perfectly sighted in at all times. EoTech G33.STS is perhaps the best known magnifier, but you should consider other brands like Sightmark, for example, for their superb quality and attractive price.