Vortex Defender Flip Up Cap (Eyepiece)
"The Vortex Defender E-10 eyepiece cap is a simple but highly effective accessory for protecting the ocular lens of your riflescope. Built to guard against dust, moisture, and general wear, it maintains a secure fit while remaining quick and easy to use. The spring-loaded design flips open smoothly and stays out of the way when you’re ready to shoot, helping ensure your optic is always clear and ready for action. If you want a dependable way to protect your riflescope’s eyepiece, the E-10 is an excellent choice." - Soph.
Vortex Defender Flip Up Cap (Eyepiece)
The Vortex Defender Flip UP Cap (Eyepiece) is the last flip cap you will ever need!
Virtually indestructible, this cap will fit snugly on nearly all Vortex Optics and features a snap flat spring that will keep your line of sight unobstructed.
Rifle ranges the world over are littered with broken flip caps. This is one cap you will most likely never see in a flip cap boneyard.
The E-10 cap has three stop positions. The first vertical, to put your dope disk (optional accessory) literally right in your face. The second at a 45° and the third at 90° to lay flat back.
The Vortex Defender Flip Up E-10 fits all Vortex® Riflescopes except the 1-inch tube Viper® model VPR-M-01BDC, VPR-M-04BDC and VPR-M-03BDC and range of other riflescopes that have an eyepiece with an outside diameter of 40-46mm.
Outside diameter: 40-46 mm | 1.57-1.81 inches
- Compatibility Fits most Vortex riflescopes, excluding 1-inch tube Viper models VPR-M-01BDC, VPR-M-04BDC, VPR-M-03BDC
- Eyepiece Outside Diameter 40–46 mm (1.57–1.81 inches)
- Stop Positions Vertical, 45°, 90°
- Mechanism Snap-flat spring
- Durability Virtually indestructible design
- Virtually indestructible design built to withstand heavy use and harsh conditions
- Snap-flat spring mechanism keeps your line of sight unobstructed when the cap is open
- Three stop positions (vertical, 45°, and 90°) for versatile viewing angles and dope disk placement
- Secure, snug fit compatible with nearly all Vortex optics eyepieces (40–46mm diameter)
- Reliable and durable alternative to standard flip caps prone to breaking
- Optimised for tactical and field use, ensuring long-lasting performance and convenience
- Vortex Defender Flip Up Cap (Eyepiece)
1. What does the Defender eyepiece cap do
It protects the eyepiece (rear lens) of your scope from dust, dirt, moisture, and scratches
2. What size does it fit
It fits eyepieces with an outside diameter of approximately 40–46mm (1.57–1.81 inches)
3. Is it compatible with all Vortex scopes
It fits most Vortex riflescopes, with a few exceptions such as certain 1-inch tube Viper models
4. How is it installed
It uses a simple press-on friction fit that secures firmly to the eyepiece housing
5. What makes it different from objective caps
This version is specifically designed for the rear (ocular) lens, rather than the front objective lens
6. Does it open easily while shooting
Yes, the spring-loaded hinge allows quick, one-handed flip-up operation
7. What are the three stop positions
It can lock in vertical, 45°, or fully flat (90°) positions for flexibility and visibility
8. Can it hold a dope disk
Yes, the vertical position allows you to attach a dope disk for quick ballistic reference
9. Will it block my view when open
No, it’s designed to stay flat and completely out of your sight picture when flipped open
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
Tactical Scope Shipping Policy
Our aim is to ensure that your order arrives with you as soon as possible and in the safest, most cost-effective means.
Shipping charges may be subject to additional surcharges if out of area or over weight restrictions.
DPD SHIPMENTS REQUIRE THE CUSTOMER TO SHOW A PIN CODE ON DELIVERY – READ MORE: HERE
Note: The above DPD link is to our group partner site Optics Warehouse, with whom we share logistics and stock. Link opens in a new window.
Couriers
We use DPD, Royal Mail, TNT, and UPS courier services for all our UK and international orders. Once your order is dispatched, you will receive an email with your unique tracking number.
In-Store Items
These are items we have in stock and aim to dispatch within 1–2 working days. During busy periods, this may be delayed slightly. If you'd prefer to collect your item in person, please contact us in advance to arrange. Collection orders must be paid for beforehand.
Pre-Order Items
Pre-order items are typically out-of-stock or in limited supply. Purchasing a pre-order secures your item, and it will be dispatched within 24 hours of restock where possible. Check the product page for estimated restock dates. These dates may change, so staying in touch is advised.
International Delivery & Taxes
If your shipping address is outside the UK, you may incur import duties or taxes upon arrival in your country. These charges are your responsibility. Customs regulations vary, so please check with your local customs office. Some packages may be opened for inspection.
Need Help?
If you need assistance, call us at +44 (0)1803 611895 (Optics Warehouse) or email [email protected].
DPD Shipments & PIN Code Delivery
We have now introduced DPD Pin Code verification for all orders shipped via DPD. You will receive a PIN via email and text.
A valid email and mobile number must be provided at checkout. Emails will come from Riviera House 3PL. Please check spam/junk folders if not received.
Failure to present your PIN to the delivery driver will result in a failed delivery and rescheduling may be required.