Butler Creek 30100 Flip-Open Black Polymer Objective Lens Cover - Size 10 (38.10mm)

A Butler Creek Size 10 flip-open objective lens cover keeps your scope's front lens protected from dust, moisture, and weather without slowing you down when a shot presents itself. These polymer covers are purpose-built for hunters and shooters who need their optics ready in an instant—the thumb-actuated flip design lets you uncover your glass in one smooth motion while staying focused on your target. The custom-fit friction mount grips your 38.10mm objective securely, and the semi-O-ring seal maintains an air-tight, water-tight barrier against the elements.

Whether you're glassing from a ridge at dawn or waiting out a downpour in the field, Butler Creek covers protect your investment without the fuss. The silent spring hinges won't clang or rattle and spook game, and the whole assembly weighs less than an ounce—you won't notice it's there. The ambidextrous design works equally well for left- and right-hand shooters, and the rugged black polymer handles temperature swings down to –40°F without becoming brittle or sluggish.

If you're serious about maintaining sight picture clarity in serious conditions, a flip-open objective cover beats fumbling with rigid caps or lens sleeves. Butler Creek's friction-mount system means no tools needed—just slide it on and forget about it until you need to shoot.

Key Features

• Fast flip-open design for quick access to your scope's objective lens
• Custom-fit friction mount holds securely without tools
• Air-tight, water-tight semi-O-ring seal protects against dust and moisture
• Silent spring hinges keep the cover quiet around game
• Ambidextrous operation for left- and right-hand shooters
• Lightweight polymer construction (less than one ounce)
• Rated for extreme cold conditions down to –40°F

Specifications

Frequently Asked Questions

What size objective lens does this cover fit?

This is a Size 10 cover designed for 38.10mm objective lenses. Check your scope's objective diameter to confirm compatibility before ordering.

Will the flip-open hinge stay quiet in the field?

Yes. Butler Creek uses silent spring hinges on this cover so you won't hear a rattle or clang when the cover snaps open or closed—a key detail for hunters who need to stay undetected.

How does the cover mount to my scope?

The custom-fit friction mount grips your objective securely without requiring any tools or modifications to your scope. Slide it on and it's ready to go.

Can I use this cover in extreme cold?

Yes, this cover is tested and rated to perform in temperatures down to –40°F, so it won't become brittle or sluggish in deep winter hunts or high-altitude shooting.