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Vortex Defender Flip Objective Scope Caps 44 ( 48-53Mm), O-44
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$29.99
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SKU: O-44-875874005884
Overview
Designed to protect the objective end of compatible Vortex optics, this flip cap is sized for 48–53 mm outside diameters and is intended for a snug fit on a range of models. The snap flat spring helps keep the line of sight unobstructed, while side tabs allow quick opening and closing when conditions change. It is a practical choice for hunters and shooters who want simple lens protection without adding unnecessary bulk or complexity. Compatibility is specific, so it is worth confirming fit before ordering.
Why Hunters Choose the Vortex
Fits Snugly
On nearly all Vortex Optics
Snap-flat Spring
Helps keep the line of
Side Tabs
Allow quick opening and closing
Compatible Several
Several Viper, Diamondback HP, and
Compact Flip-cap
Design is described as virtually
Key Features
- Flip objective scope cap for 48-53 mm outside diameter objectives.
- Snap flat spring helps keep the line of sight unobstructed.
- Tabs on each side allow quick opening and closing.
- Designed to fit snugly on nearly all Vortex Optics.
- Compatible with select Viper PST, Viper HS, Viper HST, Diamondback HP, and CrossFire II models.
Best Used For
- Hunters using Vortex scopes with 48–53 mm objective lenses and compatible models listed here.
- Field users who want quick flip-open access without leaving the line of sight obstructed.
- Shooters needing a snug-fitting objective cap for transport and range carry.
- Hunters who prefer a simple, low-fuss cap with side tabs for fast opening and closing.
- Owners replacing a worn flip cap on compatible Viper, Diamondback HP, or CrossFire II optics.
Specifications
| Compatibility | Nearly all Vortex Optics; Viper PST (PST-210S1-A & M), Viper HS (VHS-4303 & 4305), Viper HST (VHS-4308 & 4309), Diamondback HP (DBK-10019 & 10015), CrossFire II (CF2-3016 & 31013) |
|---|---|
| Features | Snap flat spring; tabs on each side for quick open or close |
| Outside Diameter | 48-53 mm | 1.89-2.08 inches |
Pros
- Fits snugly on nearly all Vortex Optics objective lenses within 48–53 mm.
- Snap-flat spring helps keep the line of sight unobstructed when open.
- Side tabs allow quick opening and closing in the field.
- Compatible with several Viper, Diamondback HP, and CrossFire II models.
- Compact flip-cap design is described as virtually indestructible.
Considerations & Trade-offs
- Sized for an outside diameter of 48-53 mm, so fit depends on matching your optic’s objective size rather than a universal one-size approach.
- The cap is described as fitting nearly all Vortex Optics, but the provided fit list is specific to certain models, so compatibility should be checked before purchase.
- The snap flat spring and side tabs are designed for quick opening and closing, which is useful in the field but adds a mechanical component compared with a simpler fixed cover.
- This is an objective scope cap only, so it addresses lens protection and access management rather than any broader scope or rifle setup needs.
Suggested Comparisons
- Objective scope caps
- Rifle scope accessories
- Scope lens protection accessories
Suggested Accessories
- Scope cover
- Lens cleaning kit
- Rifle scope mount
- Optics storage case
Frequently Asked Questions
What objective size range does the O-44 cap fit?
The listed outside diameter is 48-53 mm, or 1.89-2.08 inches.
Which Vortex scopes is this cap listed as fitting?
The description specifically names Viper PST (PST-210S1-A & M), Viper HS (VHS-4303 & 4305), Viper HST (VHS-4308 & 4309), Diamondback HP (DBK-10019 & 10015), and CrossFire II (CF2-3016 & 31013).
How does the cap stay out of the way when open?
It uses a snap flat spring that keeps your line of sight unobstructed.
Is the cap easy to open and close in the field?
The description says it has tabs on each side for quick open or close.
Does the product provide material or durability details beyond the description?
The source only says it is "virtually indestructible"; no material specifications or test details are provided.