Butler Creek Flip-Open Objective Lens Cover, Black Polymer, 51.90mm, Size 33 (30330)

The Butler Creek Flip-Open Objective Lens Cover in Size 33 is a purpose-built lens protector designed for hunters and shooters who demand reliable optics in the field. This 51.90mm black polymer cover pairs fast, thumb-operated flipping action with a custom-fit friction mount that grips your scope securely without permanent attachment. When conditions turn nasty—mud, rain, dust, extreme cold—this lens cover keeps your objective glass clean and ready; open it in a heartbeat when your moment comes.

What sets this cover apart is the engineering beneath the casual design. The semi-O-ring seal creates an air-tight and water-tight barrier around your lens, stopping moisture and debris before they touch your glass. Silent spring hinges won't betray your position, and the ambidextrous flip mechanism works equally well whether you're left-handed or right-handed. At less than an ounce, it adds negligible weight to your rifle setup.

Built to perform in extreme environments—tested to –40°F—this cover is sized specifically for your scope. The Size 33 designation ensures a precision fit; always consult the manufacturer's size chart to verify compatibility with your particular scope model before ordering.

Key Features

• Fast flip-open design for quick target acquisition
• Silent spring hinges won't spook game or alert targets
• Water-tight, air-tight semi-O-ring seal protects lens from moisture and dust
• Custom-fit friction mount anchors securely to your scope
• Truly ambidextrous operation for left- and right-handed shooters
• Weighs less than one ounce
• Tested to –40°F for extreme cold performance
• Black polymer construction

Specifications

Frequently Asked Questions

Will this lens cover fit my scope?

The Size 33 designation is specific to scopes with a 51.90mm objective lens diameter. Always refer to Butler Creek's size chart to confirm compatibility with your exact scope model before purchasing, as using an incorrect size will result in a poor fit.

Can I use this cover in wet or cold weather?

Yes. The semi-O-ring seal creates a water-tight barrier to keep moisture off your lens, and the cover is tested to perform in temperatures as low as –40°F, making it suitable for harsh field conditions.

Does this cover work for both left- and right-handed shooters?

Yes. The flip-open mechanism is fully ambidextrous, so it operates smoothly whether you mount it for a left- or right-handed shooter.

Will the hinges make noise when I flip it open?

No. The cover features silent spring hinges designed not to spook game or alert targets when you open it, even in quiet hunting situations.