There are very few of these available so get one before they're all gone again!
This is the eye and detent cover you'll find attached to the left side of your Spyder MR2 w/eye or MR3 milsim markers. Sometimes you may just torque the screw down a little too much and these puppies will crack on you. The cover holds the LH rubber nubby detent, eye and eye wires in place.
This is a replacement for Kingman part #329/BLS013 in your manual.