The Butler Creek Flip Open 03 Objective scope cover (MPN BC30035) provides mechanical lens protection for rifle scopes, red dot optics, and monoculars with an outer objective bell diameter of 34.0 mm (1.340"). Engineered from black polymer, this protective cap utilizes a slip-on friction fit to create an airtight and watertight semi-O-ring seal against rain, sand, and fine dust. A spring-loaded hinge mechanism allows hunters to instantly flip the cover open with a quiet thumb flick for immediate target acquisition without spooking game.

Key Features

• Friction-Fit Objective Mounting: Installs directly onto optic objective bells measuring a nominal 34.0 mm (1.340"), with a manufacturing tolerance range of -0.010 in (-0.25 mm) to +0.025 in (+0.64 mm).
• Spring-Loaded Flip Lid: Features a silent spring hinge that opens smoothly with minimal hand movement.
• Ambidextrous Dual Tabs: Built with finger tabs on both sides of the lid to ensure rapid, ergonomic opening for both left- and right-handed shooters.
• Environmental Protection: Internal semi-O-ring seal locks out moisture, spinifex debris, and fine dust.
• Sub-Zero Functional Rating: Tested and rated for reliable mechanical operation in freezing environments down to -40°F (-40°C).
• Ultra-Lightweight Build: Adds less than 1 oz (< 28.3 g) to the firearm setup, preserving the balance of lightweight hunting and rimfire rifles.

Product Specifications

• Nominal Bell Diameter: 34.0 mm (1.340")
• Fit Range: 33.75 mm to 34.64 mm (1.330" to 1.365")
• Tolerance Allowance: -0.010 in (-0.25 mm) to +0.025 in (+0.64 mm)
• Material: High-grade black polymer
• Mount Type: Slip-on friction fit
• Minimum Operating Temperature: -40°F (-40°C)
• Weight: Less than 1 oz (< 28.3 g)
• Power Requirements: None (mechanical)

Who is the Butler Creek Flip Open 03 Objective for?

• Australian outback pest control shooters — Requires an airtight seal to block fine dust and spinifex debris from contaminating optics with an objective bell diameter of 34.0 mm (1.340"), adding less than 1 oz (< 28.3 g) to mobile rifle setups.
• Alpine deer stalkers — Needs a spring-loaded flip-open rifle scope objective cover that remains fully operational in sub-zero freezing conditions down to -40°F (-40°C) for instant, silent target acquisition.

Less suitable for: Rifle scope objective bells measuring outside the 33.75 mm to 34.64 mm range, such as 33.0 mm optics requiring a dedicated Size 03A cover or 35.2 mm optics requiring a Size 05 cover, as well as ocular eyepiece housings requiring dedicated push-button eyepiece covers.