SaleIn Stock Vortex Defender 40mm Objective Flip Up Cap
- Virtually Indestructible: Made from rugged, impact resistant polymer to survive the harshest field conditions.
- Locks Flat: High tension spring loaded hinge snaps open and locks flat against the scope body for an unobstructed view.
- Three Stop Eyepiece: Eyepiece model (E-10) features three open positions (vertical, 45°, and flat) to easily read custom dope charts.
- Weatherproof Fit: Flexible, rubberized collar stretches easily for a secure, slip, free, and dustproof seal.
- Broad Compatibility: Designed to fit Vortex scopes as well as matching outside diameters on other premium optics.
- Comprehensive Sizing: Available to fit a wide range of scope measurements: Eyepiece (E-10): 40–46 mm 24mm Obj (O-24): 28.25–31.25 mm 32mm Obj (O-32): 38–41 mm 40mm Obj (O-40): 45.5–48.5 mm 44mm Obj (O-44): 48–53 mm 50mm Obj (O-50): 55–59 mm 56mm Obj (O-56): 62–66 mm
Vortex Defender 40mm Objective Flip-Up Cap
The Vortex Defender 40mm Flip-up Cap (Objective) is the last flip cap you will ever need!
The Vortex Defender 40mm Objective Flip-Up is virtually indestructible, this cap will fit snugly on nearly all Vortex Optics® and other rifle scopes which the correct outside diameter measurements such as Schmidt & Bender PM II scopes, Nightforces to name but a couple.
The Vortex Defender Flip-Up features a snap flat spring that will keep your line of sight unobstructed.
Vortex Defender 40mm Objective Flip-Up Cap Specifications
- Objective 40 : - Outside diameter: 45.5-48.5 mm | 1.8-1.9 inches
Vortex Defender 40mm Objective Flip Up Cap Features
- Objective 40 : - Outside diameter: 45.5-48.5 mm | 1.8-1.9 inches
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Vortex Defender 40mm Objective Flip-Up Cap
1. What does the Defender 40mm flip cap do
It protects your 40mm objective lens from dirt, debris, moisture, and impact when not in use
2. What size scopes is it compatible with
It is designed to fit scopes with a 40mm objective lens diameter, but for best results check the outside diameter of your scope’s objective housing
3. How do you install it
It installs by pressing the cap onto the objective bell where it fits securely via a friction‑fit design
4. Is it easy to open while shooting
Yes, the spring‑loaded hinge allows quick, one‑handed flip‑up access to your lens when you’re ready to shoot
5. Will it stay closed during transport
Yes, it snaps securely closed, preventing it from opening unintentionally during movement
6. Does it interfere with my view when open
No, once flipped up it stays low and out of the way, preserving a clear sight picture
7. Will it protect against weather elements
Yes, it helps shield the lens from moisture and environmental elements like rain and dust
8. Is it durable
Yes, it’s made from rugged materials designed to withstand outdoor use and rough handling
9. Can it fit non‑Vortex scopes
It can fit other optic brands with similar 40mm objective housing internal diameters, but checking measurements is recommended
10. What warranty does it come with
It is covered by the Vortex VIP Lifetime Warranty, which is unlimited, unconditional, and transferable
- Vortex VIP Lifetime Warranty
Delivery costs & estimated arrival
Find your country below for the delivery charge and how long your order should take to reach you. All orders ship with FedEx. Estimates are in working days and exclude weekends and public holidays.
| Country | Up to 2kg | 2kg – 30kg | Estimated delivery | ||
|---|---|---|---|---|---|
| Order under €350 | Order €350 & over | Order under €350 | Order €350 & over | ||
| Austria | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
| Belgium | €8.95 | €14.95 | €14.95 | €14.95 | 4-6 working days |
| Bulgaria | €11.95 | €31.95 | €31.95 | €31.95 | 7-9 working days |
| Croatia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Cyprus | €14.95 | €89.95 | €89.95 | €89.95 | Contact us |
| Czechia | €10.95 | €21.95 | €21.95 | €21.95 | 5-7 working days |
| Denmark | €10.95 | €21.95 | €21.95 | €21.95 | 4-6 working days |
| Estonia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Finland | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
| France | €10.95 | €21.95 | €21.95 | €21.95 | 4-6 working days |
| Germany | €8.95 | €14.95 | €14.95 | €14.95 | 5-7 working days |
| Greece | €11.95 | €31.95 | €31.95 | €31.95 | 8-10 working days |
| Hungary | €11.95 | €31.95 | €31.95 | €31.95 | 5-7 working days |
| Ireland | €6.95 | €6.95 | €8.95 | €8.95 | 2-4 working days |
| Italy | €10.95 | €21.95 | €21.95 | €21.95 | 5-7 working days |
| Latvia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Lithuania | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Luxembourg | €11.95 | €31.95 | €31.95 | €31.95 | 5-7 working days |
| Malta | €14.95 | €89.95 | €89.95 | €89.95 | Contact us |
| Monaco | €10.95 | €21.95 | €21.95 | €21.95 | 4-6 working days |
| Poland | €10.95 | €21.95 | €21.95 | €21.95 | 5-7 working days |
| Romania | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Slovakia | €11.95 | €31.95 | €31.95 | €31.95 | 5-7 working days |
| Slovenia | €11.95 | €31.95 | €31.95 | €31.95 | 6-8 working days |
| Spain | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
| Sweden | €11.95 | €26.95 | €26.95 | €26.95 | 5-7 working days |
Returns & withdrawal
Which option you use depends on why you are sending the item back.
Changed your mind?
You have 14 days from receiving your order to withdraw from your purchase. Use our Withdrawal from Contract form to tell us. It is the quickest way, and we will then email you a free returns label.
If you would rather post the item back yourself to our returns address in Ireland, you pay the postage. Full details are on our Returns page.
Withdrawal from ContractFaulty, damaged or wrong item?
If your item arrived faulty, damaged or not what you ordered, please follow the steps on our Returns page. We cover the cost of returning these items.
Full details of all our return options are on that page.
Returns pageDelivery prices are shown in euros and confirmed at checkout.

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