Butler Creek Flip-Open Objective Lens Cover, Black Polymer, 58.70mm Size 43 (Model 30430)

The Butler Creek Flip-Open Objective Lens Cover, Size 43 is the fast, reliable way to protect your scope's objective lens in the field. Designed for hunters and shooters who need instant access without fumbling, this flip-open cover stays mounted and ready—no loose caps to drop or lose when you need to take a shot. The custom-fit friction mount holds it securely to your scope while the silent spring hinges open smoothly without spooking game or slowing you down.

Built for hard use, this black polymer cover seals out moisture and dust with an air-tight semi-O-ring design and creates a watertight barrier your lens can count on. Tested to perform in brutal cold down to –40°F, it's engineered to stay reliable whether you're hunting in alpine terrain, wet timber, or extreme conditions where lens protection matters. The truly ambidextrous design works from either side, and at less than an ounce, it adds virtually no weight to your rig.

Size 43 with a 58.70mm diameter is custom-fitted to match specific scope models—verify the size chart before ordering to ensure proper fit and function. Whether you're running a hunting rifle, competition build, or precision rig, this cover stands between your optic and the elements.

Key Features

• Flip-open design stays mounted; no separate lens caps to manage or lose
• Silent spring hinges won't alert game
• Air-tight semi-O-ring seal keeps dust and moisture out
• Water-tight custom-fit friction mount anchors securely to your scope
• Tested to –40°F for extreme-condition reliability
• Truly ambidextrous operation from either side
• Lightweight at less than one ounce
• Black polymer construction

Specifications

Frequently Asked Questions

Will this cover fit my scope?

Size 43 with 58.70mm diameter is designed for specific scope models. Check the Butler Creek size chart to confirm your objective lens diameter matches Size 43 before ordering.

Does it stay on the scope when flipped open?

Yes. The custom-fit friction mount anchors the cover securely to your scope, and the flip-open design lets you swing it aside without removing it, so it's always there when you need it again.

Is it quiet for hunting?

Yes. The spring hinges are specifically designed to operate silently, so opening the cover won't spook game or draw attention.

How well does it protect against moisture and dust?

The air-tight semi-O-ring seal keeps dust and moisture out, and the water-tight design protects your lens in wet conditions. It's been tested to perform reliably in extreme cold to –40°F.