ISC Internal Scope Cap v2 Kit 41mm 44mm 46mm 51mm Medium. The ISC was created to solve environmental and laser threats facing military law enforcement hunters and the hobby shooter alike. The ISC gives you the ability to reduce your signature as well as protect from dirt dust wind rain and laser strikes by use of a patented modular system. This system is comprised of a Honeycomb Iris and Protective window. These three features work together to stop glint glare reflections allow you to control the amount of light entering your scope work as a Laser sheild and finally the removeable window to protect the scopes lenses with a glass or plastic window that can also reduce eye strain and improve extended shooting operations for the shooter as well. The V2 system is the second generation of the ISC that has a built in honeycomb that is not designed for quick replacement or shooters that dont require a honeycomb. Specifications for ISC Internal Scope Cap v2 Medium Kit: Manufacturer: ISC Objective Lens Diameter: 41 - 51 mm Fabric/Material: Aluminium Color: Black Features of ISC Internal Scope Cap v2 Medium Kit: Built in yet removable honeycomb - The Honeycomb was designed to be built into the ISC for long term use or for those that do not need a honeycomb that wish to use a rubber plug or nothing in place of it. Those that want to remove this honeycomb must do so from the front with a hook or send in to Lirces 3 to have it removed. Adjustable IRIS - Twist to open or close aperture an internal sheild that allows a full sight picture even when closed to a 2mm pin hole. Only the amount of light that enters the scope is affected the smaller the hole the less light you will see. Removable protective Window - High clarity glass window (clear) or High clarity plastic window (clear) Rubber Boot Kit - 41mm 44mm 46mm 51mm. All ISC's are internally threaded to allow for different sized rubber boots or Scope Specific Adapters to be switched out at anytime. Each Rubber boot comes with three parts the 1. Rubber boot itself 2. Threaded Metal adapter that hold the rubber boot 3. The Lens rentention ring that holds the Glass or Plastic window and holds the Metal adapter to the rubber boot. Each rubber boot you get will have these three parts included for each size. Small rings only work with small ISC the same with Medium and Large configurations. Package Contents: ISC Internal Scope Cap v2 Medium Kit ISC 100-0032: Internal Scope Cap v2 Kit 41mm 44mm 46mm 51mm Medium