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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 4.3 out of 5 by 57.
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Defender® Flip Cap Eyepiece

New for 2016. 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 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 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 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 1 out of 5 by from Does not stay when opening Isn't tight enough on eye piece, comes off when you try to flip it open. slides forward when you go to close it. Bad fit
Date published: 2018-02-13
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 is the difference in the Defender series flip caps and the regular flip cap optic cover other than and price?

Asked by: MikeS
The Defender Flip Caps are a more durable option, the eyepiece flip cap is also made to fit our dope disk that is custom made with your ballistics.
Answered by: Mike at Vortex Optics
Date published: 2018-02-13

Which caps fit the viper 6-24x50

Asked by: Marsh912
Sizes E-10 and O-50 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2018-02-12

Will the E10 disable the fast focus eyepiece on the Vortex Crossfire II 3-9x50mm?

Asked by: CKelly9460
The fast focus eyepiece is meant to set the diopter and should only require setting once. After you have that diopter set you can install the flip cap.
Answered by: Mike at Vortex Optics
Date published: 2018-02-13

What size would I need for a vortex HS 4-16x44 scope 

Asked by: Moises_vargas
Sizes E-10 and O-44 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2018-02-08

What size covers will I need for a Nikon Prostaff 3-9x40 BDC?

Asked by: Scott
Size O-32 will fit your eyepiece, the O-40 will fit your objective.
Answered by: Mike at Vortex Optics
Date published: 2018-02-07

I have a pst ebr-1 2.5x10 32mm and I'm wondering if your e-10 eye piece cap will fit? Thank you for your help.

Asked by: Oscar31
Yes, the E-10 and O-32 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2018-02-05

What size Defender flip caps will fit my Crossfire 4-12 x 40 scope

Asked by: bobgus
You'll need E-10 and O-40.
Answered by: Jon S.
Date published: 2018-02-07

I bought a vortex viper 4-16x50 and I need covers for both sides what size do I need

Asked by: Doc22
You'll need E-10 and O-50 for that optic.
Answered by: Jon S.
Date published: 2018-01-29
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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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