The Butler Creek Flip-Open Eyepiece Scope Cover in size 18 (Butler Creek part no. MO20180) is sized for a 1.7-inch (43.2mm) eyepiece, so it covers the ocular lens of a matching riflescope. The lid flips open with a touch of your thumb, and silent spring hinges keep it from spooking game when you open it to shoot. A water-tight, custom-fit friction mount anchors it to the scope, and an air-tight semi-O-ring seal keeps dust and moisture off the glass. It suits a shooter who wants the ocular lens protected on the trail and clear the instant a target shows up. Butler Creek sizes the eyepiece and objective covers separately, so this is the eyepiece version of size 18.

Key Specifications

• The cover is Flip-Open size 18, one of Butler Creek’s numbered sizes, so you can match it to your scope’s measured eyepiece.
• It is sized for a lens measuring 1.7 inches (43.2mm), the diameter Butler Creek lists for this size.
• This is the eyepiece-lens version, because Butler Creek sizes each lens of a scope separately.
• The lid opens with a touch of your thumb, which keeps your eye on the target.
• Silent spring hinges keep the lid from spooking game when you open it to shoot.
• A water-tight, custom-fit friction mount anchors the cover to the scope.
• An air-tight semi-O-ring seal keeps dust and moisture off the lens.
• It performs from -40 to 120 degrees Fahrenheit, so cold-weather hunts and hot range days are both covered.
• The cover weighs less than an ounce, adding almost nothing to the rifle.
• The design is truly ambidextrous, so it works the same for right-handed and left-handed shooters.

Frequently Asked Questions

What size scope does the size 18 Flip-Open eyepiece cover fit? It is sized for an eyepiece measuring 1.7 inches (43.2mm). Butler Creek advises choosing the smaller size if your scope falls between two sizes, and a piece of electrical tape around the lens can help tighten the fit.

How does it hold up in cold and wet weather? Butler Creek rates the Flip-Open line to perform from -40 to 120 degrees Fahrenheit, and the custom-fit friction mount and air-tight semi-O-ring seal keep moisture and dust off the lens.

Does it work for left-handed shooters? Yes. Butler Creek describes the Flip-Open eyepiece cover as truly ambidextrous, so it works the same for right-handed and left-handed shooters.

Buy the Butler Creek Flip-Open Eyepiece Scope Cover, Size 18, 1.7-Inch

Match the lens measurement, pick the size, and the cover does the rest. Browse more scope accessories or order this one from our Lubbock, Texas gun shop for fast, direct shipping.