The TRUGLO Glo-Dot Universal Shotgun Sight is what you need for your shotgun. This sight is designed for vent rib barrels. The core of the sight is red with the outside being green. This sight is extremely low profile.

Specifications and Features:
Our original wing and clay sight in dual color
Fits all ventilated rib shotguns regardless of width or tapering
Extremely low profile
Fiber diameter is .120"
Endorsed by Ducks Unlimited
Gunsmith installation may be required