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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 77.
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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 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
Rated 5 out of 5 by from Tighter fit, same quality product in the past, the flipcovers have been inadequate because the fit wasn't tight enough. This new line of defender flip cap's are much snugger. I have a .308 remington 700 with mckrees precision chassis and being able to have a quick dope book right above the eye has been incredibly helpful. Although that is just a feature, the product itself is durable and flexible rubber that maintains a tight hold on the optic. Coupled with that and sufficient tension springs make this a great product yet again from Vortex.
Date published: 2017-06-15
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What size for the Viper HS-T 4-16x44 Riflescope w/ VMR-1 Ret ? I ordered 2 of the defender eyepiece thinking they were for both ends through ExpertVoice. I see now I need one for the objective end. Is there a way I can exchange the unopened one for it?

Asked by: B.B.
The Defender caps that fit your scope are the E-10 and the O-44. If you need to exchange one of the eyepiece caps give us a call at 800-426-0048 ext. 6.
Answered by: Graham at Vortex Optics
Date published: 2018-04-20

What size Defender caps will fit the Burris tac 30 1x4?

Asked by: Molonlabe2018
I would go with sizes E-10 and O-24 for your scope.
Answered by: Mike at Vortex Optics
Date published: 2018-04-18

2 questions, need defender caps for Nikon P223 4-16 and Primary Arms 4-14X44mm Riflescope - ACSS HUD DMR .308/.223. Nikon says 44mm for outside OD eye piece and only gives 40 for objective but measured at 1.98 inches or 50 mm. Dont have any data on the PA

Asked by: Irunwire
For your Nikon, sizes E-10 and O-44 will fit. The Primary Arms would take sizes E-10 and O-44. Let me know if you have any other questions.
Answered by: Mike at Vortex Optics
Date published: 2018-04-16

Which Front and rear defender flip cap fit a Viper PST Gen II 1-6 X24

Asked by: Bryan
Sizes E-10 and O-24 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2018-04-09

Razor HD LH 3-15 x 42, what size caps for front & rear? Thanks...

Asked by: Ridge_Reaper
Sizes E-10 and O-40 will fit the Razor HD LH.
Answered by: Mike at Vortex Optics
Date published: 2018-04-02

why wont mine stay closed? It keeps popping open

Asked by: Rick435
The eyepiece will not stay closed if you have the example dope card still in it, take that out and it should stay closed. If that does not fix the closing issue, give us a call at 800-426-0048 ext 5.
Answered by: Mike at Vortex Optics
Date published: 2018-04-12

What defender caps fit the Viper Hs LR 4-16

Asked by: CJones94
Sizes E-10 and O-50 will fit the Viper HSLR 4-16x50.
Answered by: Mike at Vortex Optics
Date published: 2018-03-28

I got a crossfire ll 3-9x40 scope which ones for that?

Asked by: Ozzy
Sizes E-10 and O-40 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2018-03-26
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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: 2017-06-07
Rated 5 out of 5 by from Tighter fit, same quality product in the past, the flipcovers have been inadequate because the fit wasn't tight enough. This new line of defender flip cap's are much snugger. I have a .308 remington 700 with mckrees precision chassis and being able to have a quick dope book right above the eye has been incredibly helpful. Although that is just a feature, the product itself is durable and flexible rubber that maintains a tight hold on the optic. Coupled with that and sufficient tension springs make this a great product yet again from Vortex.
Date published: 2017-06-07
Rated 5 out of 5 by from Tighter fit, same quality product in the past, the flipcovers have been inadequate because the fit wasn't tight enough. This new line of defender flip cap's are much snugger. I have a .308 remington 700 with mckrees precision chassis and being able to have a quick dope book right above the eye has been incredibly helpful. Although that is just a feature, the product itself is durable and flexible rubber that maintains a tight hold on the optic. Coupled with that and sufficient tension springs make this a great product yet again from Vortex.
Date published: 2017-06-07
Rated 5 out of 5 by from Nice fitting caps Shipping was fast as usual. Caps fit snugly. I like these better than the Butler Creeks I had. The spring tension is much better and the 3 position on the eye piece cap is great. I put these on my Viper PST 6-24x50 FFP which sits atop a 6.5 Grendel AR. Although the eyepiece cap moves some on opening due to the rubber eyepiece on the scope it's not a big distraction. The dual opening tabs are a plus. All in all I think these are great scope caps. Now, if only Vortex would make their dope discs available.
Date published: 2017-06-07
Rated 5 out of 5 by from Nice fitting caps Shipping was fast as usual. Caps fit snugly. I like these better than the Butler Creeks I had. The spring tension is much better and the 3 position on the eye piece cap is great. I put these on my Viper PST 6-24x50 FFP which sits atop a 6.5 Grendel AR. Although the eyepiece cap moves some on opening due to the rubber eyepiece on the scope it's not a big distraction. The dual opening tabs are a plus. All in all I think these are great scope caps. Now, if only Vortex would make their dope discs available.
Date published: 2017-06-07
Rated 5 out of 5 by from Best scope caps by far! Another top notch product from Vortex. Shipping was fast and customer service was great as always. These caps are heavy duty and far more durable than any other caps I've ever used. These things fit like a glove on your scope and are very snug. These caps are far more superior than any other competitor. The Dope Disk feature is a great option and I will be getting mine as soon as possible. Thanks again to Vortex for making a product that maintains your reputation for top of the line quality.
Date published: 2017-06-07
Rated 5 out of 5 by from Best scope caps by far! Another top notch product from Vortex. Shipping was fast and customer service was great as always. These caps are heavy duty and far more durable than any other caps I've ever used. These things fit like a glove on your scope and are very snug. These caps are far more superior than any other competitor. The Dope Disk feature is a great option and I will be getting mine as soon as possible. Thanks again to Vortex for making a product that maintains your reputation for top of the line quality.
Date published: 2017-06-07
Rated 5 out of 5 by from Great Flip Caps Another fantastic product by Vortex! I've gone through several brands and this one is by far the best one I've tried. It always seems like they just don't fit quite right and Vortex hit it out of the park. I've got a Vortex Viper PST 4-16 and they fit perfectly. Ultra rugged and the fit/finish is consistent with the Vortex name. Its also nice to have your ballistics fit right into the cap where its easy to see. Great Job!
Date published: 2017-06-07
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