O-40 - DEFENDER FLIP CAPOBJECTIVE 40
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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|