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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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i have the vortex viper 6.5-20x50 . which flip caps fit mine? thanks

Asked by: Islandlife1975
The E-10 eyepiece and the O-50 objective piece will fit your scope.
Answered by: Graham at Vortex Optics
Date published: 2018-06-13

Will these fit an Athlon Ares BTR 4.5-27x50?

Asked by: thatdude
Yes, they should work. You will want our E-10 Eyepiece along with our O-50 Objective piece for your scope.
Answered by: Graham at Vortex Optics
Date published: 2018-06-11

Will this eyepiece fit a strike eagle 1-8x24 scope

Asked by: DW08
Yes, that will fit the Strike Eagle 1-8x24.
Answered by: Josh at Vortex Optics
Date published: 2018-06-06

I just purchased a Vortex scope, Viper PST11, PST-5258, 5-25 x 50ffp. What flip cap models will work on this scope ? Thanks for your help !

Asked by: Denny
The E-10 eyepiece and the O-50 objective piece will work with your scope.
Answered by: Graham at Vortex Optics
Date published: 2018-05-25

What size will fit my Burris XTR II 1.5-8x28mm?

Asked by: cab494`
You will want the E-10 and the O-24. The O-24 is going to be a bit tight, but that's the best fit we have.
Answered by: Josh at Vortex Optics
Date published: 2018-05-24

On the Nikon P-TACTICAL Rimfire 2-7x32 MK1-MOA, it has not arrived yet. Here are the specs in the owner's manual: Objective Outside diameter - 40.8mm Eyepiece Outside diameter - 44.0mm It has a focus ring at the edge of the eyepiece. Is that a problem

Asked by: ndb3
Thanks for the information! I recommend the Objective 32 for both (O-32). It may be a bit tight on the eyepiece but should work. That won't be a problem. I'd set the focus for your eye and then place the flip cap over it.
Answered by: Josh at Vortex Optics
Date published: 2018-05-15

Hi. What size defender covers would fit a Nikon P-TACTICAL Rimfire 2-7x32 MK1-MOA

Asked by: ndb3
I was unable to find measurements for the outside diameter of the eyepiece and objective lens of that optic. If you are able to measure and let me know I will be happy to recommend sizes for you.
Answered by: Josh at Vortex Optics
Date published: 2018-05-15

Which size do you recommend for the Bushnell HDMR (3.5x21x50)? I would like both eye and objective. Thanks!

Asked by: OMNIS
The E-10 eyepiece and the O-50 objective piece will be close for your optic.
Answered by: Graham at Vortex Optics
Date published: 2018-05-08
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