Egw Universal .670''Radius Sight Mount For Vortex Viper/Venom Blk

The EGW Universal .670" Radius Sight Mount for Vortex Viper/Venom is a precision optics mount engineered to fit a wide variety of shotguns and rifles with receiver rings that match its specific dimensions. This universal sight mount works across multiple platforms—from Mossberg 500/590 series shotguns to Remington 700 rifles and numerous other centerfire models—making it a practical choice if you're running a red dot or reflex sight across multiple firearms. The .670" bottom radius design seats securely on rounded receiver profiles, and the included mounting hardware (screws in 6-48 and 8-40 configurations) ensures you have the right fasteners for your particular application.

EGW engineered this mount with tight tolerances and multiple spreads (.500"–.505" and .8625") to accommodate the receiver ring variations across different manufacturers. Installation requires just a 5/64" allen wrench, and the mount is designed to sit with a slight gap at the top of the radius between the receiver and mount—this is normal and expected. Whether you're building a lightweight shotgun setup for waterfowl or modernizing a rifle platform, this universal mount brings versatility and solid mechanical repeatability to your optics installation.

Before ordering, verify that your specific firearm is listed in the common applications below. Some platforms (Benelli Supernova, Benelli M2, Stoeger M3000/M3500, and Remington 7400/7615) require the front ring set only and may need longer 8-40 screws. If you're uncertain about fitment on your particular receiver, confirm the ring dimensions match the spreads listed in the specifications.

Key Features

• Universal .670" radius design fits shotguns and centerfire rifles with compatible receiver rings
• Multiple screw configurations (6-48 and 8-40) included for different applications
• Two receiver ring spreads (.500"–.505" and .8625") accommodate various manufacturers
• Simple 5/64" allen wrench installation
• Engineered for secure, repeatable optics mounting

Specifications

Frequently Asked Questions

Will this EGW mount fit my shotgun or rifle?

The EGW Universal .670" Radius Mount is compatible with Mossberg 500, 590, 835, 930, 935 shotguns (including pre-'97 and post-'97 versions), Benelli Auto, Super Black Eagle, Vinci, M2, Supernova, Browning A-Bolt 12 Gauge, Franchi Affinity, Savage 210, 212, 220, Stoeger M3000/M3500, Winchester 1300, Winchester SXP, and Remington 700, 722, 40X, 783, 710/770, XP-100, and Models 4, 6, 7400, 7615, plus Savage Arms centerfire models and Winchester 70. Some models (Benelli M2, Benelli Supernova, Stoeger M3000/M3500, Remington 7400/7615) require the front ring set only. Verify your specific firearm's receiver ring dimensions match the .500"–.505" or .8625" spreads before ordering.

What screws do I need, and how do I install this mount?

The mount includes three screw options: 6-48 x .313", 8-40 x .313", and 8-40 x .335". Most standard applications use the 6-48 screws; firearms requiring longer reach (like post-'97 Mossberg 500/590 and certain Benelli models) need the 8-40 longer screws. Installation requires only a 5/64" allen wrench. Expect a slight gap at the top of the radius between the receiver and mount—this is normal and correct.

Is this mount compatible with Vortex Viper and Venom red dots?

This EGW mount is designed to accept Vortex Viper and Venom reflex sights. Verify that your specific sight and firearm combination is a functional pairing before installation.

What if my firearm isn't listed in the common applications?

If your gun isn't listed, measure your receiver ring and compare its spreads to the .500"–.505" or .8625" specifications. If your rings don't match either spread, this mount will not fit properly. Contact EGW or your dealer if you're unsure about fitment on an unlisted platform.