Vortex O-40 Defender Flip Cap Objective
This is the last flip cap you will ever need! Virtually indestructible, this cap will fit snugly on nearly all Vortex Optics and features a snap flat spring that will keep your line of sight unobstructed.
|Outside Diameter (inches)||1.8 – 1.9 inches|
|Outside Diameter (mm)||45.5-48.5 mm|