Butler Creek Flip-Open Objective Lens Cover - Black Polymer, Size 09 (37.70mm) Model 30090

The Butler Creek Flip-Open Objective Lens Cover in Size 09 (37.70mm) is a no-nonsense lens protector built for hunters and shooters who need fast, reliable glass protection without fumbling. This black polymer cover pairs custom fit with one-handed operation—flip it open with your thumb when a shot presents itself, and close it just as quickly when conditions demand it. The design keeps your optic safe from the elements between opportunities while staying out of your way when it matters.

What makes this cover stand apart is the combination of speed and sealing. The watertight, airtight design uses a semi-O-ring to lock out dust and moisture, and silent spring hinges mean you won't spook game when you open or close it. At less than an ounce, it adds virtually nothing to your setup, and the friction-mount system anchors it securely without permanent modification. The ambidextrous flip hinge works equally well for left or right-handed shooters, and it's been tested to perform in brutal conditions—down to -40°F.

Size 09 fits objective bells measuring 37.70mm in diameter. Whether you're glassing from a stand, running a tactical rifle, or hunting in wet mountain country, this cover delivers the reliability you need from a brand trusted across American hunting camps for decades.

Key Features

• Custom-fit friction mount for your 37.70mm objective bell
• One-handed flip-open design—no tools or complex mechanics
• Watertight and airtight seal with semi-O-ring design
• Silent spring hinges won't startle game
• Tested and rated to -40°F
• Truly ambidextrous for left and right-handed use
• Weighs less than one ounce
• Black polymer construction

Specifications

Frequently Asked Questions

Will this lens cover fit my scope?

Size 09 is designed for objective bells measuring 37.70mm in diameter. Check your scope's objective diameter to confirm fitment. Butler Creek covers are custom-fit to their sizes, so proper sizing ensures a secure, watertight seal.

How does the flip-open mechanism work?

The cover opens and closes with a simple thumb flick. Silent spring hinges do the work, so there's no audible click or snap that might spook game. Once open, it stays out of your sight picture and line of fire.

Can left-handed shooters use this cover?

Yes. The Butler Creek flip-open design is truly ambidextrous, so it works equally well for both left and right-handed shooters.

What's included and is it easy to mount?

The cover uses a friction-mount system that grips your scope's objective bell without permanent fasteners, screws, or tools. Simply slide it onto your scope and secure it with the friction fit—no gunsmithing required.