Shotgun Front Optic Sight - Red.
Ready to use, just clip onto barrel shotgun and push up to the bead sight. This will make a big difference for how quickly you can pick up a target - especially in low light conditions. A great, low-cost addition to your shotgun.
Fits many shotgun models, 12 or 20 gauge but will only work on plain / unventilated barrels with a bead sight.