OR3GUN™ Sight Saddle for Mossberg® Shotguns

The OR3GUN Sight Saddle™ (SS-MOSS) system for Mossberg shotguns allows you utilize any Glock® format front sight as your shotgun's front sight. For the vent-rib equipped application, a coordinated rear sight is included. For round barrels, our Front Sight Saddle w/ RBA adapter is the one you will want. Our Sight Saddle - Optic™ (SS-OPTIC) allows low-profile, direct to receiver mounting of popular Vortex, Burris, Shield, Leupold, SIG, Crimson Trace and Holosun micro red-dot sights to most Mossberg shotguns.

Natural Habitat	Application	Compatibility	Features	Color	Price	Status	ORDER
	Front/Rear w/ Shims Gun Sports Hunting	All Vent-Rib Equipped US Mossberg 12/20 Gauge Shotguns	Anodized (For Durability) Includes Shims (For Elevation)	OR3GUN Pitch Black	$45.95	Low Stock
	Front w/ Round Barrel Adapter Gun Sports Hunting	All Heavy Round Barreled US Mossberg 12 Gauge Shotguns	Includes FRONT Sight Saddle w/ Radiused Shim (for Mossbergs)	OR3GUN Pitch Black	$22.95	In Stock
	Sight Saddle Optic (FF3) Gun Sports Hunting	Burris FastFire 2 Burris FastFire 3 Vortex Venom Vortex Viper (Requires 6-32 Screws)	Requires Micro Red-Dot (See List) Includes 8-40 Screws (Receiver Mount)	OR3GUN Pitch Black	$39.95	In Stock
	Sight Saddle Optic (RMR) Gun Sports Hunting	Trijicon RMR Trijicon SRO Holosun HS407C Holosun HS507C Holosun HS508T (Requires 6-32 Screws)	Requires Micro Red-Dot (See List) Includes 8-40 Screws (Receiver Mount)	OR3GUN Pitch Black	$39.95	Low Stock
	Sight Saddle Optic (SMS) Gun Sports Hunting	Shield RMS Shield RMSc Shield RMSw Shield SMS SIG Romeo Zero Leupold DeltaPoint Pro Crimson Trace CTS-1550 Holosun HS407k Holosun HS507k (Requires 6-32 Screws)	Requires Micro Red-Dot (See List) Includes 8-40 Screws (Receiver Mount)	OR3GUN Pitch Black	$39.95	Low Stock
	Sight Saddle Optic (SMS) Gun Sports Hunting	Shield RMS Shield RMSc Shield RMSw Shield SMS SIG Romeo Zero Leupold DeltaPoint Pro Crimson Trace CTS-1550 Holosun HS407k Holosun HS507k (Requires 6-32 Screws)	Requires Micro Red-Dot (See List) Includes 8-40 Screws (Receiver Mount)	Anodized OR3GUN Damp Earth	$42.95	In Stock

There is no a shortage of sights on the market for shotguns, but many of the most innovative sight designs are only available for pistols. Sights suitable for a match with both daylight and night elements are even slimmer pickings. It didn't require the OR3GUN Project to look beyond our own pistols for a simple solution. We set out to mount a Glock front sight to a Mossberg vent rib and match it to a specially designed rear sight. Mission accomplished.

While most of the OR3GUN team does run a Glock in competition, our sight choice was supported by analyzing the sheer number of options available for the platform. The vast majority of aftermarket Glock sights are available in the same .165" height as OEM. With our team shooting a few night matches each year, we wanted to be able to utilize night sights on our competition 930s without losing our daytime zero. We also wanted our sights hard-set to minimize the risk of the sights working their way out of adjustment.

Glock sight equipped Sight Saddles (such as those shown below) can allow quick changes of fiber optic rods or feature tritium (night sight) and dayglow (or glow-in-the-dark) elements within the same sight. While there may be individual shotgun sights out there with some of these features, ours operate as a system that shares the same zero.

With our Sight Saddles, you can have a whole variety of front sights ready to easily change for the conditions of a given match, without having to worry about your zero changing too.

Once we had developed the Sight Saddle System for your vent rib, we turned our focus to getting the most popular micro red-dot optics mounted to the receiver for open division guns, hunters and those with vision issues making a red-dot the best choice for their shotgun.

The Sight Saddle - Optic is a sleek way to mount a micro red-dot from Vortex (Venom/Viper), Burris (Fast Fire Series) or Trijicon (RMR/SRO) to your Mossberg shotgun. As most Mossberg 500/590 and 930/935/940 series shotguns manufactured since the mid 1990s feature an 8-40 tapped receiver, the Sight Saddle Optic is the lowest profile, most efficient approach to mounting these optics in a position that gives a wide field of view and requires the least amount of rise adjustment to your stock. While there are receiver to stock optic mounts for other shotguns, the Mossberg's tang safety has left most companies to ignore the Mossberg when it comes to optic mounts. Until now, the only official option has been a receiver rail and factory rail mount. These are considerably higher in profile and compound the cost for guns without an existing rail. All Sight Saddle Optic mounts sold after January 2022 will feature 6-32 threads for securing your optic. While your optic's supplied screws may vary from this, the common 6-32 format greatly simplifies finding the exact length and style needed for your specific application at most hardware stores.

The Front Sight Saddle with Round Barrel Adapter is designed for heavy barreled Mossberg 12 Gauges with a standard factory bead. This options allows those without a vent rib to utilize a Glock front sight on the 12 Gauge, US built Mossberg shotgun.

One of the ways the OR3GUN team has found to utilize the Rear Sight Saddle in night competition is with a strip of industrial grade photoluminescent (glow in the dark) tape coupled with our favorite Ameriglo ProGlo (photoluminescent/tritium) front sight. A two second charge with a flashlight keeps it well lit for the entire stage and usable for over an hour. If there are delays, the tritium will continue to glow, leaving a standard night sight at front.

Your Glock compatible front sight (not included) is secured using a standard Glock sight tool (also not included). The entire front Sight Saddle mounts to the existing threaded front bead hole using the included 5-40 screw. While shipped to be spot-on with most 930 competition guns, two shims are included with our full set, allowing for elevation correction when one or both shims are used under the front or rear sight. The rear Sight Saddle can be mounted in the mid-bead position (using factory 5-40 threads) or you may drill (# 38) and tap (5-40) your vent rib to mount it further back.

The OR3GUN Sight Saddle is precision machined from 6061 T6 alloy. Each Sight Saddle includes a black 5-40 screw that will secure the adapter to your existing threaded bead holes. The Sight Saddle is de-horned and de-burred to a matte finish, then anodized in OR3GUN's Pitch Black to blend in nicely with the rest of your gun. The front Sight Saddle can be used alone, with factory Mossberg adjustable rear (turkey) sights or OR3GUN's own rear sight.

The installed set (when using a standard Glock 0.165" height) corrects the range of adjustment typically needed to zero for 50 yard slug impact with both shims up front. Aftermarket 0.220" competition Glock format sights up front will usually require no shims at all for a 50 yard slug impact using Fiocchi 1 Oz Low-Recoil slugs.

Check out our new Sight Saddle YouTube video, detailing advantages of the system for the Mossberg platform.