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Monstrum Rubberized Flip-Up Rifle Scope Lens Covers

Free shipping on orders over $29.99

$14.99

$ 6 .99 $6.99

In Stock

1.Size:Objective Lens | 26-30 Mm Diameter


About this item

  • Rubberized flip-up rifle scope lens covers that conform tightly around your rifle scope tube, protecting your lenses from dust and abrasion
  • IMPORTANT: Sizing is not based on the objective lens size of your scope - a 3-9x40mm scope will not fit with a 40mm sized lens cover. For the correct fitting lens cover, you must physically measure the outside diameter of your scope eyepiece and objective.
  • Each package includes one Rubberized Flip-Up Lens Cover
  • Spring-loaded flip-up mechanism pops open effortlessly when needed and securely tightly when not in use
  • Please refer to sizing chart and sizing video, carefully measuring the OUTSIDE diameter of your scope, to ensure the proper size and fit.



Product Description

lens covers

When you are lining up a shot, clean functional optics are an absolute necessity! Protect your optics from dust and abrasion with the Monstrum Tactical Flip-Up Rifle Scope Lens Covers. The spring-loaded flip-up mechanism pops open effortlessly when needed and clicks shut when closed. Made of durable rubber and polymer materials, they wont damage the finish of your rifle scope while shielding the lenses from the harsh elements.

For optimum fit, carefully measure the OUTSIDE DIAMETER of both your rifle scope’s eyepiece and objective bell. IMPORTANT: Sizing is not based on the objective lens size of your scope - a 3-9x40mm scope will not fit with a 40mm sized lens cover. For the correct fitting lens cover, you must physically measure the outside diameter of your scope eyepiece and objective.

Size/Diameter (mm) | Diameter (in)

FCE-A - 37-43mm 1.45-1.69 in
FCE-B - 43-49mm 1.69-1.92 in
FCO-C - 26-31mm 1.02-1.22 in
FCO-D - 31-37mm 1.22-1.45 in
FCO-E - 37-43mm 1.45-1.69 in
FCO-F - 43-49mm 1.69-1.92 in
FCO-G - 49-55mm 1.92-2.16 in
FCO-H - 55-62mm 2.16-2.44 in
FCO-J - 62-68mm 2.45-2.60 in

Snug Fit for Any Scope

Snug Fit For Any Scope

The rubber sleeve holds tight to your scope body and prevents against cover rotation. This part allows us to cover a wide range of diameters without needing to be exact.

Spring-Loaded Flip-Cap

Spring-Loaded Flip-Up Action

Hidden inside the axis is a spring loaded and ready for action. All it takes is a flick and it automatically opens and holds the cap in the back position and out of sight.

Match Your Gear

Easy to Install, Easy to Open

Our sizes fit nearly every scope on the market. With a flick they open all the way and close again with a satisfying click, keeping your optics clean and free of scratches and blemishes. (scope is not included)

Finding the Right Flip-up Cover

Step 1: Measure the EXTERNAL DIAMETER of your scope's objective bell and/or eyepiece

Please note that this measurement is different than the diameter of your objective lens.

TIP: Do NOT measure the curvature of the housing, measure straight across.

Finding the Right Flip-up Cover

Match Your Measurements

Installing the Lens Covers

Test the Spring-Loaded Cap


Genesis27.4
2025-09-04 19:34:30
The fit is excellent, product seems to be constructed of quality material, price is economical & the functionality of the product works as expected. I cannot rate on the durability yet as I’ve only had them a short while.
thomas fignar
2025-08-27 09:56:54
fit and flexabilty is good as long as you pic the correct size. that is up to you!
AMNorse
2025-07-21 19:05:33
Very good quality for the price. Fits a DNT scope well. Clips closed securely and opens without too much effort. Overall I'm satisfied. I think this is a good choice if Tenebraex doesn't make something for your particular scope.Lost one star lost due to weak spring that squeaks when opening, but it's really not a big deal.
Jeff Robbins
2025-07-02 11:58:05
Very nice quality. Fit my scope like a glove
JULIAN S WEISENSEL
2025-06-29 18:57:34
The media could not be loaded.
George Pan
2025-06-07 13:17:12
Great flip caps for the price. Compared very well against my Vortex Defender, but at a fraction of the price. Very snug fit.
Marshal Shlafer
2025-05-26 18:56:59
THIS REVIEW APPLIES (OR TRYING) TO USE THESE ON A TUBULAR RED DOT SIGHT. I have Monstrum flip-up caps for several of my rifle scopes, and they're great. However I though I'd try these on my red dot, Crimson Trace CT25, which is a "tubular" type somewhat like a rifle scope... not a reflex or holo sight that projects a dot on a window; the proper diameter cover was available.I suspect my comments will apply to other makes and models of red dots with a similar general design.Unlike the case with a rifle scope, where there are long metal barrels to slip the the rubber part of this cover over, on my red dot there is very little in the way of a ring, front and back, that will be covered by the tube; little for the tube to hang on to and hold it in place. On mine it's only about 9 mm (about 0.3"). That's not enough to hold the rubber tube on when, for example, you flip the cap up/open.I used narrow zip ties, one front one back, to keep it in place. That worked. However that left about 16 mm (about 0.6") of flexible rubber tube with nothing under it between the edge of the red dot and the plastic part of the cap. Counting front and back, that left two long tubes to look through... sort of like tunnel vision. I could try to cut off the part of the rubber tube that's not really attached to anything, but would probably make a hatchet job of that.In summary, this is a good product for an actual rifle scope (I'd give it 5 stars), but it's far from ideal for a red dot.
jerry f
2025-04-21 12:48:25
Fits nice and tight and snaps up easily
Louis
2025-02-27 16:41:49
Well made but had to return because of wrong size.
Giorgios
2025-01-31 13:12:51
These flip up lens covers are great. They ar Meade if food quality and the rubber sleeve is very flexible to get it on the Objective lens on your scope. I haven’t tried the eyepiece cover yet. I would suggest ordering slightly larger than what you think that you need. My first order was too tight and it would fit. I ordered the next size up and it fit perfectly. Highly recommended
Darren
2024-12-16 16:31:14
looks like they fit really good
jocelyn
2024-12-15 15:59:58
Fermé bien et reste fermé
NewfieMatt709
2024-12-06 10:33:29
Seems to fit really tight and Nice. I like. Lol
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