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The HiViz S400-R Wide Magnetic Shotgun Sight features a fixed red fiber-optic LitePipe and magnetic snap-on base for shotgun ribs measuring .328" to .437" (8.3–11.1mm). This wide S-Series sight provides a bright front-sight reference for compatible shotguns without requiring replacement of the factory bead.
Use our Shotgun Rib Width Reference and guide on how to measure shotgun rib width to help determine whether the sight fits your shotgun.
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| Brand | HiViz |
| MPN | S400-R |
| UPC | 613485584622 |
| Product Name | Wide S-Series Magnetic Shotgun Sight |
| Sight Type | Magnetic fiber-optic front sight |
| Fitment | Shotgun ribs .328"–.437" wide (8.3–11.1mm) |
| Rib Width | 21/64"–7/16" |
| Mounting | Magnetic snap-on base |
| LitePipe Color | Red |
| LitePipe | One fixed, non-replaceable red LitePipe |
| Series | HiViz S-Series |
The HiViz S400-R Wide Magnetic Shotgun Sight is designed for shotguns with wider ventilated ribs measuring .328" to .437" (8.3–11.1mm). Its magnetic snap-on base provides a convenient way to add a visible front sight to a compatible shotgun without replacing the factory front bead.
The S400-R features a red fiber-optic LitePipe that gathers available light to help make the front sight stand out against the target and surrounding background. As part of the HiViz S-Series, it offers a straightforward design for shooters who know their preferred sight color and want a fixed sight rather than an interchangeable LitePipe system.
The red LitePipe is not interchangeable, so confirm that red is your preferred sight color before choosing this model. Accurate rib measurement is also important: the S400-R is designed for the specified wide-rib range, while the S200 and S300 models accommodate narrower ribs. For the same wide-rib fit with a green LitePipe, consider the S400-G.