The Specialty Iron I Rifle Peep Aperture 0.148″ offers the widest aperture size in the Iron I system, delivering maximum field of view while still maintaining sight clarity and focus. Perfect for shooters needing enhanced visibility or light transmission, it features Optical Centered Technology (OCT) for precise verifier alignment, along with Protected Lens Technology (PLT) and Tool-less Aperture Technology (TAP) for easy, tool-free handling. Designed exclusively for the Iron I Peep Housing (sold separately), this aperture is ideal for a broad range of shooting conditions where a larger sight picture is beneficial.