Objective lens caps have fit perfect on all my scopes - Vortex Defender Flip-Cap Lens Cover

Make sure to use a caliper to measure the outside diameter of your scope lens before ordering! Be prepared for a snug fit by opening the cap before placing tube on lens end making sure the hinge is on top. I probably wouldn't recommend this for a scope with an AO adjustable end unless the amount of adjustment is limited to a quarter turn so the end cap doesn't bind against your rifle when adjusted to infinity. Just push the lower tab with your thumb and it pops open. The eyepiece cover has been less than great due to splitting issues on the tube