Monstrum Rubberized Flip-Up Rifle Scope Lens Covers
- Rubberized flip-up rifle scope lens covers that conform tightly around your rifle scope tube, protecting your lenses from dust and abrasion
- Spring-loaded flip-up mechanism pops open effortlessly when needed and securely tightly when not in use
- Each package includes one Rubberized Flip-Up Lens Cover
- For optimum fit, carefully measure the OUTSIDE DIAMETER of both your rifle scope’s eyepiece and objective bell. Please note that this measurement is different than the diameter of your objective lens.
- Available in a full range of sizes to fit any rifle scope. Eyepiece Cover available in 37-43 mm(1.5-1.7 inch) or 43-49 mm(1.7-1.9 inch diameter). Objective Lens Cover available in 26-31 mm(1.0-1.2 inch), 31-37 mm(1.2-1.4 inch), 37-43 mm(1.5-1.7 inch), 43-49 mm(1.7-1.9 inch), 49-55 mm(1.9-2.1 inch), or 55-62 mm(2.2-2.4 inch) diameter.
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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. Please note that this measurement is different than the diameter of your objective lens. Example: if your eyepiece measures 31mm, then you should order a 26-31mm Lens Cover so it fits tighter.
Diameter (mm) | Diameter (in)
26-31mm | 1.02-1.22in
31-37mm | 1.22-1.45in
37-43mm | 1.45-1.69in
43-49mm | 1.69-1.92in
49-55mm | 1.92-2.16in
55-62mm | 2.16-2.44in
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.
Finding the Right Flip-up Cover
Match Your Measurements
Installing the Lens Covers
Test the Spring-Loaded Cap
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-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.
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)
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This solves the problem of acquiring the correct and secure fit for your scope without the hit or miss slow waltz of the hard plastic realm.
Simply measure the OD [outside diameter] of your scope ends - check the chart and then purchase the ball park size that will work for you.
The hinges work with a finger push to flip open easily [no tools or exercise plan required] grab one, it's only ten bucks and try it out for yourself.
If for some reason it does not meet your own level of satisfaction send it back; that's what I always did in the past when purchasing caps/covers online until.
Note: I am not in anyway a paid agent for anyone's nickles or dimes; just a guy who stumbled upon a great product and is in the active process of replacing other prior purchased caps one at a time and each new purchased / received cap is the same great product.
Also one has the freedom in being able to notch or modify their cap as needed for their own scope; my example is a rough first cut on a UTG 3-12X44 30mm Scope, AO, 36-color Mil-dot.
Update; Your purchase has a LIFE time warranty and the Monstrum group stands behind it........
My first though was that I used the wrong size so I removed it and used my micrometer to measure the scope objective and it measured 62mm. I was very hard to install. I had to stretch it to fit. despite the sizing chart provided by the seller this cover may fit a 62mm lens but will not last long before splitting. These covers when installed don't allow full adjustment of focus and objective. Dont wast your money on these covers!
Update: I inspected my other scopes and found three more of these covers that had split in the same place.
I will continue to use them throughout the year and into next & will comment on durability later on. At this point, everything is 5-star in my book!
>Return after use:
Unfortunately they do not hold up.
I got the correct size (very good chart by the way), but after the third week of being on my scopes, the rubber spit on both the reticle and objective ends of both sets I got for two different scopes.
Ease of use and application is still great, caps still snap shut very well, and I have no issues at all with the product except for the poor quality of rubber used to wrap the scope ends. Don't mis-judge, I didn't get any weird cleaning agents on it or something like that... nothing touched that rubber besides my own hands & Hoppe's #9 gun oil. It's simply bad material and all 4 covers split in a straight line lengthwise from a bare edge of the rubber to the plastic cap. I could see that being a problem if it was way too tight, but one of the 4 caps was almost a loose fit & I used electrical tape for good measure, and even that one split (beneath the tape) with expansion/contraction...
Use better materials and work with me on replacements & I'll 5-star it once again (after use, of course).
Good try guys, but I'll go to the competitors if needs must... affordability means nothing if I can't depend on the product when I need it.
The caps are spring loaded and open wide enough to stay out of the way for the most part.
My only complaint is that when open there are no detents to hold the cap in place and it doesnt fold flat against the scope tube. Its held out a bit from flat but not too bad. The more expensive Vortex caps are better in this regard but almost twice the price.
Overall i think its a good cap and feels fairly heavy duty and durable.as long as the plastic itself is of good quality i expect it to last a long time. I recommend this cap to anyone wanting something more durable than the typical caps from the usual maker but doesnt want to spend a full $20 on the Vortex. A good solid cap.
So far they close tightly. To flip them you have to be deliberate, but it's not difficult. They are spring loaded , flip up positively, and stay in place once there.
They look good, but the rubber does seem to hold onto dirt. I would get the FDE version if I could do it again, which I think would hide the dirt better.
I did have some trouble with the position of the ocular cover as the bolt on my rifle knocks it open. My rifle is a Howa 1500 with a 90° bolt throw. If I had a rifle with a 60° bolt throw like a Thompson Center Compass I'm sure it would be fine. The Butler Creek covers have a similar setup and the same problem, so I don't consider this a big problem for the Monstrums. I just rotated the cover slightly which allowed it to clear the bolt. Additionally, the parallax adjustment on this scope is on the front, so the cover gets in the way at the extremes or with the cover closed. Again, not a big deal for me, but something to consider.
Overall I enjoy these very much. They look good, and work well.