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Defender™ Flip Cap

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SKU: E-10
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MSRP: $29.99
*Prices in US Dollars
Reviews:
Defender Flip Cap is rated 4.4 out of 5 by 55.
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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 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 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
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 covers for a Viper PST 4-16-50

Asked by: yessirre
Sizes E-10 and O-50 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-12-05

What size flip cover would i get for Viper PST gen II 5-25 MOA rifle scope Thanks

Asked by: Danny
Sizes E-10 and O-50 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-12-04

I just purchased a Cabela's 30mm 1-4x24 AR Rifle Scope. What size flip lens covers will fit my scope?

Asked by: Aaron915
Sizes E-10 and O-24 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-11-29

I have a Nikon Monarch III 5-20x44SF M BDC and want to buy your scope caps for the front and back of my scope. What size to i need for the front and what size for the back do I need?

Asked by: Ehunter
Sizes E-10 and O-44 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-11-20

What size for Vortex Diamondback DBK-04-BDC 4-12X40

Asked by: Tony
Sizes E-10 and O-40 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-11-16

What size Defender flip caps will fit my Vortex Diamondback 3-12 x 42 riflescope?

Asked by: Blue
Sizes E-10 and O-44 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-11-15

I have a Vortex Defender Front eyepiece cover (product E-10) on a Vortex Viper PST 4x16 scope. Unfortunately the eyepiece cover slips when trying to flip up. I have no issue with the front cover. Any way to get it to not slip?

Asked by: Matt
I recommend taking some alcohol and cleaning up the inside of the rubber on the scope cap and the eyepiece of the scope to get it to grip better. If that does not work, a small piece of two sided tape on the bottom of the eyepiece will keep the cap in place.
Answered by: Mike at Vortex Optics
Date published: 2017-11-13

I own a Sightron SIII SS 832X56 LR. The objective lense is 2.56" and the ocular lens is 1.67". What size DEFENDER flip caps do you suggest? The O-56 for the objective and the E-10 for the ocular?

Asked by: Voitech383
Yes, sizes E-10 and O-56 will fit your scope.
Answered by: Mike at Vortex Optics
Date published: 2017-11-08
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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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