Monstrum G3 3-18x50 First Focal Plane FFP Rifle Scope with Illuminated MOA Reticle and Parallax Adjustment
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Availability:
In Stock.
Arrives
Tuesday, Dec 16
Color: Black
Features
- High performance tactical rifle scope with 3-18x magnification for mid to long distance shooting out to 1000+ yards
- Functionally designed first focal plane MOA reticle, with easy-to-read ranging information that remains constant regardless of magnification, for faster range estimation and holdover correction
- Equipped with a parallax adjustment dial that allows for sharper focus of the target image, elimination of parallax, and range estimation
- Inline dial controlled reticle illumination with multiple brightness intensities, for better reticle visibility in low light environments
- Package also includes set of high profile picatinny scope rings, a detachable sunshade, a set of spring loaded flip-up lens covers
Brand: Monstrum
Color: Black
Style: tactical
Sport: Hunting
Material: Metal
Magnification Maximum: 18 x
Objective Lens Diameter: 5E+1 Millimeters
Magnification Minimum: 3 x
Compatible Devices: Rifle
Mounting Type: Picatinny Mount
Brand: Monstrum
Color: Black
Style: tactical
Sport: Hunting
Material: Metal
Magnification Maximum: 18 x
Objective Lens Diameter: 5E+1 Millimeters
Magnification Minimum: 3 x
Compatible Devices: Rifle
Mounting Type: Picatinny Mount
Night vision: No
Model Name: G3F31850
Manufacturer: Monstrum
Reticle Type: Type-H
UPC: 850017827042
Item Package Dimensions L x W x H: 15.59 x 6.02 x 3.82 inches
Package Weight: 1.59 Kilograms
Brand Name: Monstrum
Warranty Description: Full Lifetime Warranty
Part Number: G3F31850-BLK
Included Components: G3 3-18x50 FFP Scope, 30mm High Profile Scope Rings, Lens Cleaning Cloth, Spring Loaded Flip-up Lens Covers, Sunshade
Date First Available: October 2, 2020
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Dec 16
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
Nice scope but for some weak boy like me I need to hit the gym, she heavy Overall great on my airsoft replica, held zero even to my gas blowback rifle
Reviewed in the United States on October 24, 2025 by Datboy4
Color: Flat Dark Earth
I recently purchased the Monstrum G3 3-18x50 First Focal Plane FFP Rifle Scope with Illuminated MOA Reticle for my range sessions, and it’s been a fantastic addition to my setup. This scope is designed for precision shooting, and it’s delivered impressive clarity and functionality for my needs. Quality and Build: The Monstrum G3 feels solid right out of the box. The 50mm objective lens is housed in a durable aluminum body that’s both lightweight and rugged. The turrets are crisp and tactile, with audible clicks for adjustments, and the illuminated MOA reticle is a nice touch for low-light conditions. It comes with lens covers, which are a thoughtful addition for protection during transport. Performance: This scope performs beautifully at the range. The 3-18x magnification range is versatile, letting me zoom in for long-distance shots while still being usable at closer ranges. The first focal plane reticle scales perfectly with the magnification, making holdovers and adjustments intuitive. The glass is clear, with minimal distortion even at higher magnifications, and the illuminated reticle (with multiple brightness settings) helps in dim conditions. I’ve had no issues with zero retention after several rounds. Value for Money: For the price, this scope is a steal. It offers features you’d expect from higher-end models—like a first focal plane reticle and illuminated MOA—at a fraction of the cost. If you’re a shooter looking for a reliable scope without breaking the bank, this is a budget-friendly option that punches above its weight. Minor Notes: The eye relief is decent but can be a bit tight at higher magnifications, so adjust your position carefully. It’s a bit on the heavier side (as expected for a 50mm scope), so make sure your rifle setup can handle the weight. Also, while it’s rated for various calibers, double-check your mounting setup for compatibility. Overall: The Monstrum G3 3-18x50 FFP Rifle Scope is a reliable, high-value choice for range shooting. It’s clear, versatile, and packed with features that make it a joy to use, all at an affordable price. I’m thrilled with its performance—5 stars for quality and functionality!
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Reviewed in the United States on April 3, 2025 by ess2thebee
Color: Black
nice scope but the center dot is way too big for precise work. it covers about 2 inches at 100 yards. other than that i like it.
Reviewed in the United States on September 21, 2025 by Leon A Moon
Color: Flat Dark Earth
I have two 6-24 G2 and G3 scopes and I really like them, but they add significant weight to the rifle for hunting applications. I am not a competition shooter. So hunting applications are more important to me. the 18x on this scope is more than enough for any ethical shooting distance on game. I prefer shooting on 6-9x, but am glad to have the extra boost if needed. The clarity on the scope is far better than I expected. Excellent. The focus is excellent. The parallax adjusts easily and with excellent focus for my eyes. The windage and elevation are easy to use and adjust with excellent feel and audible clicks. The dial can be adjusted to zero. There is no zero stop, but once sighted the dial can be set at zero. I prefer this for hunting applications. The only negative I have on this scope is that the illumination for the reticle is extremely hard to adjust. But, I won't use it very often, so I can live with it. Overall, this scope meets everything I want in a scope for a hunting application. I highly recommend it. I wish I had found this before I bought the 6-24x scopes. For hunting, I like this much better.
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Reviewed in the United States on September 11, 2024 by Glen
Color: Flat Dark Earth
This is an excellent scope, high quality, easy to use and worth every penny.
Reviewed in the United States on July 3, 2025 by Michael Gomez
Color: Black
I've used a lot of Monstrum products over the years and this is a first. It's labeled as 1 lb 5 ounces. Scope, rings, and lens caps is actually 2 lbs 2.3 ounces. Retical is rather small at 3x but glass is clear. Rings that come with the scope are nothing spectacular but are rigid enough for a hunting rifle. Lens caps are a soft rubber that open and close nicely. Illuminated Retical does put a little glow in the glass when on the higher 3 settings. Is this a scope for extreme long rang shooting in my opinion no. But it's as good if not better than scopes out there that are 2-3 times the money. For 90% of the people out there this scope is more than enough for what you are doing and more capable than the shooters skills.
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Reviewed in the United States on January 25, 2025 by DDUB
Color: Flat Dark Earth
I have had good experiences with Monstrum products, especially scope mounts and accessories like pic rail levels & lens caps. This is my first higher magnification scope. Good glass for the price. Elevation and Windage adjustment knobs have features usually found on higher end models. Nice parallax feature next to illumination knob.
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Reviewed in the United States on April 22, 2025 by Lars
Color: Flat Dark Earth
Worst gun scope ever. I bought this. After reading great reviews. It was a while before I mounted to rifle couldn’t get it to zero I was still 8 inches high and the dial wouldn’t go anymore. I changed rails and mounts trying to make it closer. Don’t waste your time or money
Reviewed in the United States on October 23, 2025 by Lori Ann Schussler