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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 3.9 out of 5 by 91.
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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 Not for hunting Finally got to use these on a hunt, they suck. I thought they'd do well after using them off the bench. But the flip covers are tight so they don't pop open really easy, which compared to butler creek I thought would be great. In the field though it seems like the cold to warm temp does something to the rubber boots so they get loose, which means you can open the damb things. When I finally got a shot at a nice buck after hiking 9 miles I had to rip the eye piece cover completely off, and when the front flipped up the whole thing canted so I lost the lower quarter of the field of view because it obscured the objective. The scope itself is a Vortex viper, so my assumption was the products should have been compatible, guess I was wrong.
Date published: 2018-11-15
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 2 out of 5 by from So close These are a little more expensive than other brands, but being made by Vortex, I thought they'd fill the bill. They are well built, for sure, but the fit leaves a bit to be desired. The eye piece cover fits perfectly and operates flawlessly. The objective cover is another story. The cap will slip off my Viper 4 - 16 x 44, so it takes two hands to operate, one hand to hold the cover in place and the other hand to open the cover. That's pretty inconvenient, in my mind. I ordered the size recommended by Vortex too, so I'm feeling slightly frustrated by this. I'm giving them two stars because they do a good job of protecting the lenses, but operating them takes some effort and precious time if you have a trophy lined up.
Date published: 2018-10-02
Rated 1 out of 5 by from Poorly Designed for Proprer Fit Both the objective (50) and eyepiece (40-46mm) Vortex Defender Flip scope covers, the specific sized scope covers recommended by Vortex Optics for my 2 Vortex scopes (Viper HS 4-16x50) have continuously failed in damp weather, causing the scope covers to slide off when attempting to lift the cover and on two occasions allowing the scope covers to fall off and get lost in the field when by rifle was slung over my shoulder. Any level of moisture - and I live and hunt in the Pacific Northwest - breaks the tension between the scope cover and the scope barrel, allowing the scope cover to slide freely. Even in dry conditions, any attempt to flip open the cover without using two hands causes the rubber around the scope barrel to pull forward towards the point where pressure is being applied to flip open the cover. I have now had to purchase 4 additional scope covers - 2 to replace the 2 lost in the field - and 2 to carry on hunting trips as back ups. I am looking for suitable alternative covers - and this is disappointing..
Date published: 2017-11-13
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 2 out of 5 by from Poor fit Like older reviews stated the E-10 fit is down right horrible. I have the PST 6-24x50 and there's no way I can flip this cap one handed. It will slip completely off before it flips open. The rubber seems to be too deep for the illuminate adjustment knob as well. I might have to cut a half circle in it once I get it focused properly, I haven't decided yet. Overall construction seems solid and the front cover fits perfectly.
Date published: 2018-11-09
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Hi I have the ultimateslam 3-9x40mm scope for a slug gun. I know I need the eyepiece flip cap for the one end but what size of flip cap will I need for the other? Thanks!

Asked by: TOMEyER
Thanks for the question! I am unable to find the exact specs on your scope, however the O-40 should be close.
Answered by: Graham at Vortex Optics
Date published: 2018-12-04

Does any Defender series flip cap fit the CF-RD1?

Asked by: OSEANMC
Unfortunately we do not have any flip caps for the Crossfire red dot.
Answered by: Josh at Vortex Optics
Date published: 2018-12-03

Are the defender flip caps available for the diamond back hp 3-12x42?

Asked by: Dbraun
Absolutely, you will need the eyepiece (E-10) and the Objective 44 (O-44) for that HP 3-12x42.
Answered by: Josh at Vortex Optics
Date published: 2018-12-03

What caps would I need for a viper PST 416S1-m. Its 4-16 by 50?

Asked by: Adam
Thanks for the question! You will want the E-10 eyepiece and the O-50 objective piece for your scope.
Answered by: Graham at Vortex Optics
Date published: 2018-11-28

I have a trijicon accupoint 2.5-10x56 do you know which ones would fit

Asked by: Deerhunter
Thanks for the question! While I can't find the exact measurements need to make the proper recommendation, the E-10 eyepiece and the O-56 objective piece should be close for your scope.
Answered by: Graham at Vortex Optics
Date published: 2018-11-27

What 2 defender flip caps do I need for a VHS 4315-LR.  6-24x50

Asked by: Jim 962
You will need the eyepiece (E-10) and Objective 50 (O-50) for your optic!
Answered by: Josh at Vortex Optics
Date published: 2018-11-26

Which two Defender Flip Caps do I need for the front and rear lenses for my Viper PST Gen II 5-25x50 FFP MOA?

Asked by: dmccarthy
You will need the eyepiece(E-10) and the Objective 50(O-50) for your setup!
Answered by: Josh at Vortex Optics
Date published: 2018-11-25

Which two Defender Flip Caps do I need for the front and rear lenses?

Asked by: dmccarthy
Thanks for the question! It would depend on which scope you have. Give us a call at 800-426-0048 ext. 5 and we will help you out!
Answered by: Graham at Vortex Optics
Date published: 2018-11-21
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