O-50 Vortex Optics Defender Flip Cap Objective 50 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. Specifications: Weight 1.3 oz Outside Diameter (inches) 2.2 - 2.3 inches Outside Diameter (mm) 55-59 mm
