Vortex Defender Flip Cap Eyepiece

The Vortex Defender Flip Cap Eyepiece fits on the rear side (facing your eye) of all Vortex riflescopes except the Viper 1-inch tube models # VPR-M-01BDC, VPR-M-04BDC, VPR-M-03BDC and Viper HS 4-16x44. Also does not fit Vortex model # VHS-4305 and VHS-4304. Made of almost indestructible material, this scope cap features a snap flat spring that will keep your line of sight unobstructed.