A Butler Creek flip-open objective lens cover in black polymer is essential gear for any serious hunter or shooter who wants to protect their scope glass without fumbling with separate caps at the moment of truth. This Size 30 model (49.80mm) fits a wide range of popular riflescopes and stays mounted and ready—no lost parts, no excuses when the deer steps into the clearing. The flip-open design means you go from protected to shooting in a single thumb motion, keeping your focus on the target while the cover stays tethered to your scope.

Butler Creek's engineering here prioritizes silence and reliability in the field. The spring hinges operate without a sound—critical when game is close and alert—while the friction-mount base grips your objective bell securely without tools or permanent modification. The semi-O-ring seal keeps dust, moisture, and grime away from your optics glass between hunts and during storage, and the airtight design has been tested down to –40°F, so extreme weather won't compromise your protection.

Build quality is straightforward: black polymer construction weighs less than an ounce, so it won't tax your already-loaded rifle. The cover is truly ambidextrous, flipping open equally well whether you're right or left-handed. If you're running a scope in the field and want to keep that glass pristine without the hassle of separate front caps, this Butler Creek cover delivers no-fuss reliability at a sensible investment.

Key Features

• Flip-open design opens with a thumb stroke—no separate caps to lose or manage
• Silent spring hinges won't alert game to your position
• Water-tight, air-tight semi-O-ring seal protects glass from dust and moisture
• Friction-mount base grips your scope's objective bell without tools
• Rated to –40°F for extreme-condition durability
• Weighs less than one ounce—minimal impact on rifle balance
• Works equally well for right and left-handed shooters
• Black polymer construction resists corrosion and blending into field conditions

Specifications

Model	30300
Size	30
Objective Diameter	49.80mm
Material	Black Polymer
Weight	Less than 1 ounce
Operating Temperature	–40°F and above
Design	Flip-open with silent spring hinges
Mount Type	Friction-mount (no tools required)
Seal Type	Semi-O-ring, air-tight

Frequently Asked Questions

Will this flip-open objective lens cover fit my scope?

This is a Size 30 cover designed for 49.80mm objective lenses. Scope objectives vary widely—refer to your scope's manual or measure the objective bell diameter to confirm the Size 30 is correct for your setup. Butler Creek offers a full size chart if you're unsure.

How does the friction mount work, and will it damage my scope?

The friction-mount base grips the objective bell of your scope without requiring tools, screws, or permanent alteration. The custom-fit design creates a secure hold that won't scratch or harm your optics.

Can I use this cover in cold weather or wet conditions?

Yes. The semi-O-ring seal is air-tight and water-tight, protecting your glass from moisture and dust. The cover has been tested to –40°F, so it will function reliably in harsh field conditions.

Do I need to remove the cover every time I shoot?

The flip-open design allows you to open the cover with your thumb in one motion while keeping it mounted to your scope, so you don't have to remove or stow it separately. When you're done, flip it closed again.