The ISC-Internal Scope Cap was Invented by Seth Lowell out of necessity, while on mission as a Sniper in Afghanistan In OEF 7 & 8 he had a pair of flip up scope caps which were standard issue for optics fail on him. Due to extreme heat the flip up caps warped in the sun and while moving into a hide site the flip up broke off leaving his optic fully exposed to damage and his position exposed through glint and glare reflection off the scope lens. Mr. Lowell came home and vowed to solve that problem facing not only scopes, but spotting scopes, binoculars, night vision goggles, thermals, Lasers and more. The rational behind concept to create the ISC was that there was no reason a cheap injection molded piece of plastic that regularly breaks should be used to protect high dollar optics and needlessly put soldiers lives at risk through detection.
The Iris/Aperture is the main feature of the ISC and its many working versions. A twist to open Iris/Aperture is vastly superior in every aspect to a rubber cap or flip up scope cap.
The ISC in all its configurations is fully protected by a Utility and a Design patents.
US Patent D860,293 (Design)
US Patent 10,359,257 (Utility)