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Black flip-up lens cover for 45-48mm objective, model O-40

Vortex Optics

Vortex Optics Defender Flip Cap 45-48mm Black O-40

SKU CH-DFBZ-R59F1

Flip cap protects 45-48 mm objective lenses from dust and impact

  • Fits 45-48mm lenses for secure coverage
  • Flip-open design allows rapid target acquisition
  • Durable polymer construction protects glass from debris
  • Black finish reduces glare in bright conditions

Flip Cap for 45-48mm Lenses

The Vortex Optics Defender Flip Cap O-40 protects the front lens of riflescopes with objective diameters between 45mm and 48mm. It shields glass from dust, moisture and impact while the optic is stored or carried in the field. The spring-loaded cover flips open with one finger for rapid target acquisition. Black finish reduces glare and matches standard scope bodies.

Mounts Directly on Objective Bell

The cap threads onto the objective housing and stays in place during recoil and rough handling. No tools are required for installation or removal. It eliminates the need for separate loose covers that can be lost in transit. The low-profile design adds minimal bulk to the optic package.

Highlights

  • Fits 45-48mm lenses for secure coverage
  • Flip-open design allows rapid target acquisition
  • Durable polymer construction protects glass from debris
  • Black finish reduces glare in bright conditions

Specifications

BrandVortex

Questions about this item

How well does the flip-cap stay closed during recoil on a 45-48 mm objective?

The Defender Flip Cap uses a spring-loaded hinge that snaps securely over the 45-48 mm objective bell, so it remains shut under normal field recoil.

Does the black finish add noticeable glare or heat when the scope sits in direct sun all day?

The matte black coating is non-reflective and adds no measurable heat gain during extended daylight use.

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