The Butler Creek Multi-Flex Flip-Open Objective Lens Cover (Size 28-29) provides durable, element-resistant protection for rifle scope objective lenses. Built with a flexible rubberised collar, this model stretches to create a watertight and airtight friction seal over front optic bells measuring between 48.00 mm and 48.70 mm (1.890" to 1.920") in outer diameter. Dual ambidextrous thumb tabs release the rigid, spring-loaded polymer lid instantly and silently, swinging it completely clear of the optical line of sight for uninhibited target acquisition in dusty or wet field conditions.

Key Features

• Multi-Flex Fitting Collar: Pliable polymer sleeve accommodates outer diameter tolerances from 48.00 mm to 48.70 mm, bridging standard individual scope cover sizes #28 and #29 for a secure friction fit.
• Silent Spring Mechanism: Dual ambidextrous thumb tabs deploy the spring-loaded flip lid quietly to avoid alerting game during stalks.
• Weatherproof Seal: Internal semi-O-ring design prevents moisture, fine dust, and debris from settling onto the objective glass during transit or active field use.
• Extreme Temperature Resilience: Retains hinge integrity and collar flexibility down to -40°C (-40°F) in freezing environments.
• Minimal Weight Addition: Weighs less than 28 g (1 oz), adding negligible mass to the rifle setup without altering balance.

Specifications

• Product Type: Rifle scope objective lens cover
• Model / MPN: 32829 / BC32829
• Outer Diameter Range: 48.00 mm to 48.70 mm (1.890" – 1.920")
• Hinged Mechanism: Non-powered, spring-loaded mechanical flip-open lid
• Minimum Operating Temperature: -40°C (-40°F)
• Collar Material: Flexible black polymer
• Lid Material: Rigid opaque polymer
• Weight: Less than 28 g (1 oz)

Who is the Butler Creek Multiflex Flip Open 28-29 Objective for?

• Hunters stalking game in dusty Outback or wet alpine terrain — Needs airtight sealing against debris and rain, utilising this rifle scope objective cover to maintain clean glass while deploying silently in temperatures down to -40°C (-40°F).
• Dynamic field shooters requiring rapid target acquisition — Requires immediate access to the optical path without adding heavy bulk, benefiting from a snap-open lid mechanism integrated into a lightweight housing weighing under 28 g that fits 48.00 mm to 48.70 mm objective bells.

Less suitable for: Rifle scope objective bells with an outer diameter strictly outside the 48.00 mm to 48.70 mm range, which require a smaller or larger alternative Multi-Flex size, or scope eyepiece housings, which require an ocular-specific push-button cover.