Hiviz TB2004 Tombuster II Fiber Optic Sight Ribbed Shotguns From 1/4? To 3/8?

Fits Vent-Ribbed Shotguns From 1/4 To 3/8 (6.3Mm To 9.7Mm) With Removable Front Bead.
Litepipe Colors: Front Green, Red; Rear Green
Litepipe Shape: Round
Fully Adjustable Sight Set