Monstrum Ares V2 Open Reflex Red Dot Sight for Rifles and Long Guns with Shake Awake
Condition: New
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Availability:
In Stock.
Arrives
Apr 17 – Apr 18
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Style: Multi Mode Reticle
Features
- Open reflex sight for rapid target acquisition of close range targets out to 100+ yards. Open reflex sights offer better peripheral vision and greater situational awareness than enclosed tube red dots.
- Offered in two different parallax free reticle configurations: circle cross reticle with a 2 MOA center dot and a multi-mode reticle with three selectable reticle options. Electronically controlled illumination with multiple levels of intensity up to daylight bright.
- The Ares Red Dot comes with a custom optical system with minimal power draw and Shake Awake motion sensing technology. The dot will automatically shut off after one hour and re-activate instantly upon movement, providing tens of thousands of hours of battery life on a single battery, up to 10 times longer than LED powered red dots.
- Integrated picatinny recoil lugs compatible with picatinny mounting platforms. For rifles and long guns. Not for use with pistols or handguns.
- All Monstrum products are backed by a lifetime guarantee.
Item Package Dimensions L x W x H: 4.17 x 2.87 x 2.24 inches
Package Weight: 0.25 Kilograms
Brand Name: Monstrum
Color: Black
Manufacturer: Monstrum
Part Number: RD216B2
Style: Multi Mode Reticle
Date First Available: May 1, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Apr 17 – Apr 18
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
Style: Multi Mode Reticle
I spent months agonizing over how much to spend and which brand and model. After an unreal amount of YouTube research and reading and comparing specs and channeling what’s probably my undiagnosed ADHD so hard, you’d think I was shopping for an organ. It’s full metal, minus the buttons which are rubber. The slating of the glass is pretty perfect. If there any tint, I can’t see it at all, even in full outdoor sun. The reticle is very clean. I discovered that I have astigmatism because if I look directly at the reticle it’s kind of slightly doubled but if you I use both eyes and look at your target, not the reticle, my astigmatism no longer messes with it and it’s crystal clear and laser sharp. I had someone who does not have astigmatism take a look and they described it as being crystal clear and perfectly sharp. Battery life is amazing. I’ve had the original batteries in there now, for about 6 months with probably the equivalent of 2 weeks worth of time and still going strong. The shake awake is flawless. The brightness of the reticle is really incredible for such an inexpensive optic. I went in the full screaming bright sun and started it as low as it goes to increase one click at a time, to see when it would be visible to a point of being usable. I was able to get it visible and easily functional 2 clicks from Max. At Max, it’s incredibly visible and remains crisp. This model does the classic Eotech style circle dot, just the dot or just the circle—no change in quality between settings. It’s really hard for me to imagine how the sight picture and reticle and glass could be better without spending a few hundred bucks. As for Zeroing, it works exactly as you want and expect it to work. It has very fine adjustments, was easy to dial in and in months of use, it hasn’t moved at all. Honestly, my only critique is I wish it had a Green mode. Then it would truly be perfect. Build Quality: 5/5 Glass: 5/5 Reticle quality: 5/5 Zero: 5/5 Brightness 5/5 Buttons: 5/5 Bang for the buck: 5/5 Material quality: 5/5 Battery life: 5/5 Support: I had emailed support asking if there was a flash kill or any sort of cover for this. My goal was to either use it to shield the glass from BB or modify the cover and install some Lexan into the cover so it held a shield in place. Unfortunately, there is not. I was able to cut and shape my own lens and devise a way to mount it. I will say also, anecdotally, the glass seems to be good quality in terms of strength. My shield got shot off at about 10ft with a .25g bb and the glass got a direct hit with 2 follow-up shots at 300fps. It didn’t crack, the glare coating didn’t scratch or otherwise. I’ve seen a LOT of optics in this price point and even some as high as 150, basically crack or straight up blow out. Needless to say, you should still use shields. It’s got a lifetime warranty so long as you don’t do don’t something stupid with it but unlike real firearms where if you get shot in the optic, you have WAY worse things to worry about than glass breaking, you do need to protect the glass. All in all, if you want an optic that’s gonna deliver as good of a quality performance as anything I’ve tried under 200$, this is an easy no brainer. Aesthetically, it looks nicer than the pictures, which already don’t look bad but once you feel it, it’s solid. It may not be the look some people want but other than that preference possibility, it could be 25$ more expensive and still be worth. I suspect this would hold zero pretty well on a decent selection of rifle calibers, without going too crazy and might even hold on a 20ga. I wish Monstrum had “pelican” style cases for this and a flash kill/shroud and it did Green as well as red but overall, you will not be disappointed at all. Everyone who sees it, asks to shoulder the rifle and give it a look or a try and they’re always very impressed and ask for the link. Best dot optic I’ve found under 100 and I would say even under 200, for its feature set and what it’s meant to do. I slapped it on the M4 using the adjustable height quickdrtach riser that Monstrum also sells. That is also a pristine purchase. Definitely look at that if you need a riser.
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Reviewed in the United States on September 18, 2025 by Lyman
Style: Multi Mode Reticle
This is really a difficult review to write, and also difficult to actually rate. I purchased this originally to mount on the diving board on one of my Monstrum Beast scopes, I have five Monstrum scopes and have been extremely pleased. After I mounted the red dot on the diving board it was impossible to zero. No big deal I then moved it to my PCC. Was able to zero it with out any issue, I really liked the large window and infinite eye relief. The motion awake function worked like a charm However when I turned on the weapon light the reticle disappeared, couldn't see anything even at the full brightness. Might as well use it as a paper weight. I then saw Monstrum had the Ares V2 in a green dot. Which I was willing to order and give it a try. Before I ordering the Ares in the green dot I submitted a question to Monstrum to find out if the Ares was compatible with the G3 Ghost magnifier. Yeah you guessed it no response. So even though I really like window on the Ares I think it's time to punt and look at some other available options CVLIFE, Sig Sauer, Holosub etc.
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Reviewed in the United States on January 23, 2026 by john morais
Style: Multi Mode Reticle
Just received this optic, and have it mounted on top of the Monstrum Archangel. It's a very good optic for the price point. Seems sturdy well built like all of Monstrum's products. I see that a lot of people are complaining about not being able to switch the reticles. All you have to do is hold the +(plus) button for 3 seconds and it will switch the reticle. It does have a square type of glow going on but it doesn't affect the sight picture or your vision. There are 3 reticles, (A square, a square with a dot in the middle, and a red dot). Both the square with the dot in the middle, and the red dot are very nice. I like them both but don't care for the one with just the square. I haven't tried to adjust for wind and elevation yet, but overall it seems to be a very solid optic.
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Reviewed in the United States on December 17, 2025 by Amazon Customer
Style: Multi Mode Reticle
Good inexpensive dot circle sight. Not as clear to look through as a Holosun. But at this price point it is a decent optic. However I can’t give this sight 5 stars. The drawback that keeps me from loving this sight is the adjusters. They are smooth adjusters with no detent. (A more expensive adjuster has clicks with each click moving the reticle a fixed distance. If you are zeroing at 50 yards and each click it 1 MOA, then you know when it’s 2 inches to the right you need to adjust 1 click…) No detent means that it’s hard to tell how much to turn the screw to zero the sight. I ended up mounting iron sights too and zeroing them first, then co-witnessing the Ares sight to the same point. Without the iron sights it would have taken me significantly more time and ammunition to get the sight properly zeroed. If click/MOA adjusters are mandatory for you, then you might look for something different. In the end, I will probably keep this sight. But I’d 100% be willing to pay more for the V3 version if it had click adjusters.
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Reviewed in the United States on June 8, 2025 by alpha charlie
Style: Multi Mode Reticle
Works well and is built solid. I like the shake a wake option. Makes the range fun, easy and fast.
Reviewed in the United States on December 15, 2025 by chuck
Style: Multi Mode Reticle
I’ve used several of their scopes and they work fine. So I tried this. Elevation adjustment was backwards. And sloppy.
Reviewed in the United States on March 17, 2026 by cameron
Style: Multi Mode Reticle
This red dot far exceeded my expectation in quality!! Just like other posts I’ve read, it was a touch heavier than I expected, which makes it feel solid!!! I never thought the reticle would be as awesome, bright, and clear as it is!!! Extremely happy with this, after being hesitant about it at first. My suggestion would be, don’t hesitate!! Get this if you’re looking for a quality red dot!!! I have many different brands, and I’d rate this as being the best bang for your buck!!!
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Reviewed in the United States on June 3, 2025 by fleig335
Style: Multi Mode Reticle
Amazing sight for the price. Do not use for picatinny canting.
Reviewed in the United States on January 25, 2026 by GingerCunt