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Defender™ Flip Cap

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Defender™  Flip Cap Click to Enlarge
SKU: E-10
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MSRP: $29.99
*Prices in US Dollars
Reviews:
Defender Flip Cap is rated 4.2 out of 5 by 80.
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Defender® Flip Cap Eyepiece

This 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 all over the world 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 E-10 fits all Vortex® Riflescopes except the 1-inch tube Viper® model VPR-M-01BDC, VPR-M-04BDC and VPR-M-03BDC. Outside diameter: 41.5-46 mm | 1.6-1.8 inches


Key Features

VIP Warranty

Rated 1 out of 5 by from Does not fit VIPER HS Bought these for my viper HS 4-16x44. They were a bit expensive in my opinion but for how tough they looked I thought it would be well worth it. Unfortunately they are not sized very well for my scope even though they say it fits it. Turns a should be one handed operation into two handed because you have to hold the cap on with one hand while you open it with the other. Missed a opportunity on big buck last weekend because of it. I'll be going back to my cheap butler creek caps as they fit much better. Hopefully they redesign these to fit my scope better as these have potential to be really nice caps
Date published: 2017-06-15
Rated 4 out of 5 by from A fix for very tight caps that pull off I bought the cap yesterday for my vortex long-range scope. And right out of the box the cap was too stiff to pop open and it would almost slide off. I contacted support but then I realized the reason was the Caps were way too stiff is because the little lip on the cap was too big. I took a flat knife and gently scratched at the edge of the cap and in the inside of the mating surface. Then I proceeded to polish inside in outside lip and the cap now opens very easily and doesn't pull off with good tactile feel yet. I know this isn't ideal for new product but sometimes you have to take matters into your own hands when quality control is not 99%.
Date published: 2018-05-03
Rated 1 out of 5 by from Completely fail under cold and damp conditions The tension / adhesion that holds these covers fails completely under cold and damp conditions. In approximately 20 degree snowy weather this 3rd rifle season here in Colorado (the type of weather you might want to have a scope cover for), both this and the larger objective cap slipped off multiple times during the course of a single hunt. Attempting to deploy the flipping action often removed the scope cover from the scope. Having a piece of equipment fail multiple times during the course of closing on a deer was an unnecessary distraction and could have ruined the opportunity. The larger objective also slipped off and was lost in the long hike back carrying the quartered deer. If you are hunting in potentially cold and damp / snow conditions look elsewhere, these caps are a hinderance rather then an assistance.
Date published: 2017-11-10
Rated 1 out of 5 by from Won't stay on scope I tried this on my Viper PST 1-4. The fit on the eyepiece is not tight enough - when trying to flip the hinged cap up the whole unit slides off the bottom of the ocular bell before the cap unsnaps.
Date published: 2017-06-15
Rated 1 out of 5 by from Tactical Pain I purchased a Vortex Viper HS-T 6-24X50 a few months ago and ordered flip caps to match. The eye piece cap is a huge hassle because it bends and flexes every time you try to open the cover. This issue may be due to the fact that the lens is not surrounded by a perfectly cylindrical eye piece and therefore has room to wobble. Either way, the cap does not seem engineered for the scopes even though they are the correct size.
Date published: 2017-09-21
Rated 2 out of 5 by from Had high hopes. Didn't work for me Bought both the eyepiece and objective caps. After working with a rep to make sure I was getting the right sizes I have found that despite being correct for my Diamondback HP 3-12x42, these just don't work like they should. The collars are not tight enough to prevent the cap from slipping off the scope when being opened and one needs to use two hands to operate them. I get that they are tough, no question about that. However, in my usage, they have shown to be impractical and I had such high hopes for a product with the Vortex name on it.
Date published: 2018-03-30
Rated 2 out of 5 by from Eye Piece Cap I have these mounted to a Vortex Viper PST 6-24x50 FFP. First off let me say the spring tension and ambidextrous tabs are amazing. The rubber that grips the eyepiece housing grips well and creates a positive seal. The dope disc is a cool novelty but not really a must as I have been doing this on scope caps that do not have these modular systems already in place for a while now. This particular scope has a rubber eye piece. Because of the both pieces are rubber it causes a lot of movement when pressing the cap closed. Once its moves to far it compresses the eye piece into into the scope cap and the cap will not close. You can remove the rubber eye piece off of you scope however I do not like the Idea of modifying a one thousand dollar scope. This cap would work flawlessly on a scope with out a rubber eyepiece. That is the only reason this is getting two stars because I can not use this product on this particular scope.
Date published: 2017-06-15
Rated 2 out of 5 by from Eye Piece Cap I have these mounted to a Vortex Viper PST 6-24x50 FFP. First off let me say the spring tension and ambidextrous tabs are amazing. The rubber that grips the eyepiece housing grips well and creates a positive seal. The dope disc is a cool novelty but not really a must as I have been doing this on scope caps that do not have these modular systems already in place for a while now. This particular scope has a rubber eye piece. Because of the both pieces are rubber it causes a lot of movement when pressing the cap closed. Once its moves to far it compresses the eye piece into into the scope cap and the cap will not close. You can remove the rubber eye piece off of you scope however I do not like the Idea of modifying a one thousand dollar scope. This cap would work flawlessly on a scope with out a rubber eyepiece. That is the only reason this is getting two stars because I can not use this product on this particular scope.
Date published: 2017-06-15
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What flip cap will I need for a nikon buckmaster 4-12x50? Each end on this scope is slightly tapered. I have had this scope since 2007, if that helps. Thanks

Asked by: MS Hunter
Thank you for your question and your interest in Vortex Optics! Unfortunately, the manufacturer does not list the specs/sizes that I would need to give you my best recommendation.
Answered by: Graham at Vortex Optics
Date published: 2018-08-13

Defender flip caps I have a strike eagle 4-24x50 ebr Can u tell me which model # i need for occular, and for objective lenses? Thanks

Asked by: Errol
You will need the E-10 and the O-50 for the Strike Eagle 4-24x50!
Answered by: Josh at Vortex Optics
Date published: 2018-08-10

What caps do I use for the 3-18x44 Strike Eagle?

Asked by: grady
You will need an E-10 and O-44 for the Strike Eagle 3-18x44.
Answered by: Josh at Vortex Optics
Date published: 2018-08-06

What parts do I want for a Kahles K16i? Thanks!

Asked by: Mike
You will need the E-10 and O-24 Defender Flip Caps.
Answered by: Josh at Vortex Optics
Date published: 2018-08-02

What size objective Defender cap will I need for the Crossfire II 4x18x44 AO ?

Asked by: Jericho
For the Crossfire II 6-18x44 AO you will need the Objective 44 (O-44) Defender Flip Cap.
Answered by: Josh at Vortex Optics
Date published: 2018-08-01

Hello, looking at getting these for my Viper PST Gen II 5-25x50. Just wondering which sizes I will need on both ends?

Asked by: Beef5246
Hello, You will want the eyepiece, E-10 and the objective lens, O-50 for your Viper PST GEN II 5-25x50.
Answered by: Josh at Vortex Optics
Date published: 2018-07-23

I have a viper hs-t 6x24x50. The e10 front lens cover is so loose that when I go to open it, it just pulls off the scope. Why is it doing this and what will fix it?

Asked by: Huntercvh
Give us a call at 800-426-0048 ext. 5 to discuss your setup.
Answered by: Graham at Vortex Optics
Date published: 2018-07-23

Can these covers be used with crossfire2 with adjustable objective

Asked by: Muff
Yes, our Defender Flip Caps can be used with a scope that has the adjustable objective. You are going to want to go with a size bigger than your objective.
Answered by: Graham at Vortex Optics
Date published: 2018-07-19
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