The Butler Creek Multiflex Flip Open 19-20 Eyepiece scope cover provides instant optical protection and rapid lens deployment for rifle scopes. Designed with a flexible synthetic collar, this slip-on friction-fit cover bridges the gap between standard size 19 and size 20 ocular bells, fitting outer diameters ranging from 1.730 in to 1.775 in (43.90 mm to 45.10 mm). Constructed from impact-resistant polymer with an internal semi-O-ring seal, it creates an airtight and watertight barrier that protects ocular glass against dust, mud, and moisture during transport and field use.

Key Features

• Multi-Flex Synthetic Collar: Expands and contracts to deliver a secure friction fit across ocular bell diameters from 43.90 mm to 45.10 mm.
• Instant Spring-Loaded Action: Features an ambidextrous thumb-tab release mechanism that flips the solid cover open quickly and silently.
• Weatherproof Seal: Internal semi-O-ring design prevents moisture, dust, and debris from reaching the eyepiece lens.
• All-Weather Reliability: Operates consistently without material embrittlement across a rated temperature range of -40°C to 49°C (-40°F to 120°F).
• Recoil-Tested Durability: Engineered to remain seated under heavy centerfire rifle, shotgun, and muzzleloader recoil.

Product Specifications

• Product Type: Rifle scope eyepiece cover
• Fitment Range (Ocular Bell Diameter): 1.730 in to 1.775 in (43.90 mm to 45.10 mm)
• Attachment Type: Slip-on friction fit with flexible collar
• Operating Temperature Range: -40°C to 49°C (-40°F to 120°F)
• Weight: ~28 g to 57 g
• Material: Impact-resistant polymer cap, synthetic collar, and internal semi-O-ring seal

Who is the Butler Creek Multiflex Flip Open 19-20 Eyepiece for?

• Field hunters operating in dusty or wet environments — requires an airtight, semi-O-ring sealed rifle scope eyepiece cover rated to operate from -40°C to 49°C, shielding critical glass from moisture and dust until deployed via the silent thumb release.
• Long-range precision shooters protecting optics during transport — needs a lightweight optic cap weighing only ~28 g to 57 g that provides a secure friction fit over ocular bells measuring precisely 43.90 mm to 45.10 mm (1.730 in to 1.775 in) to prevent lens abrasions.

Less suitable for: Rifle scopes with ocular bells under 43.9 mm (which require smaller size covers), ocular bells exceeding 45.1 mm (which require larger ocular models), or shooters needing immediate snap-shooting through a closed cover in heavy snow and rain (who are better served by a clear-lens see-through scope cap).