








🛡️ Flip, Protect, Dominate – Your Scope’s Best Defense
Monstrum Rubberized Flip-Up Rifle Scope Lens Covers provide a precision fit for scopes with 49-54mm outside diameters. Featuring a spring-loaded flip-up design, these covers offer quick lens access while protecting against dust and abrasion with durable rubberized material. Trusted by thousands, they combine tactical style with reliable performance for serious shooters.






| ASIN | B07667GRLJ |
| Best Sellers Rank | #3,353 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Sporting Optics Covers |
| Brand | Monstrum |
| Brand Name | Monstrum |
| Color | Black |
| Compatible Devices | Rifle |
| Customer Reviews | 4.2 4.2 out of 5 stars (6,705) |
| Date First Available | October 5, 2017 |
| Item Dimensions LxWxH | 6.9 x 2.4 x 2.3 inches |
| Item Package Dimensions L x W x H | 5.98 x 5.63 x 1.81 inches |
| Item Weight | 0.08 Pounds |
| Manufacturer | Monstrum |
| Material | Rubber, Polymer |
| Mounting Type | Integral Mount |
| Night vision | No |
| Objective Lens Diameter | 40 Millimeters |
| Package Weight | 0.04 Kilograms |
| Part Number | FCO-G |
| Size | Objective Lens | 49-54 mm outside diameter |
| Sport | Hunting |
| Style | tactical |
| UPC | 704715311733 |
J**N
Scope, lens cover, good price good product
Good fit stays on good product
A**T
Nice fit
Good fit looks like really good quality
J**E
Amazing value with a great secondary use.
This isn’t about scopes, this is about weapon mounted lights. The cover “31-37mm” is a perfect fit for Streamlight Protac HL-X and Hl-X Pro weapon mounted lights. Carbon buildup on your light sucks and so does taking it off to avoid carbon at the range. Being in a bad situation and having your light lens shine when a light hits you would suck even more I’m sure. This will cure both problems! The cap snaps firmly in place and the spring does its job and the cap goes all the way back to a horizontal position. I bought the 31-37mm lens cover. It says the 31-36 but after you add to cart the description shows 31-37mm. There are products made specifically for this application and will cost you around 50bucks for the same solution. This works perfectly and why spend the extra $$$. Many sizes available just measure the end of your light housing not the lens but the whole housing and you can grab the perfect size. Highly Recommend this!
S**R
Nice material
Would have gave it a 5 star but side split open when I tried to turn it once installed
T**R
Came quickly and fit nicely.
They came very quickly and that was a plus. Price is good. They were a little tight going on. I followed the measuring instruction when ordering. They fit firm and the flip up caps are firm. I did secure them with electrical tape because if one comes off on your way to hunt it is gone before you know it. As firm as they go on maybe that won’t happen but I want to know it won’t happen. Sizing annd ordering instructions were much clearer than other brands.
S**Y
Effective, but with questionable quality
These technically work fine, but they don't leave me with a lot of confidence. I've had these for almost six months to the day on two rifles and the rubber is pretty much done; all four caps are split and warped. I shoot most weekends and my guns live in air conditioning, but these things look like they've been through a few tours in kandahar. That being said, they stay on my scopes just fine and flip open nicely. The lens cover is big enough to hold a small DOPE card. As far as functionality, they're exactly what I was looking for, but I just don't see these things lasting through a year of use.
A**R
Covers lenses nicely.
Fit as it should...snug fit and flips open easily. Protects scope view from snow and rain.
R**D
Fits great
Was tough getting on there until I used a little soap, it slid right on And stays put.
V**R
Correspond exactement à ce que je désirais.
A**R
Fits 62.2 mm outside diameter objective bell on 56 mm Zeiss riflescope snugly.
V**R
Quite impressed with the quality of these, been shooting and hunting for fifty years+. The fit is great, tight and has considerable depth so you know its going to stay on the scope. I would definitely recommend to friends and family. Fair price for the quality!
T**R
Perfect fit on my vortex scope
P**.
What a PITA to install, but once installed it looks fine
Trustpilot
2 weeks ago
2 weeks ago