Monstrum Ares Open Reflex Red Dot Sight for Rifles and Long Guns | with Shake Awake Illumination
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Availability:
In Stock.
Arrives
Saturday, Sep 19
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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.
- Comes with a parallax free circle cross reticle with a 2 MOA center dot. 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.
Description
The Monstrum Ares Red Dot Sight is an 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. Comes with a parallax free circle cross reticle with a 2 MOA center dot. Electronically controlled illumination with multiple levels of intensity up to daylight bright.
Brand: Monstrum
Color: Black
Style: Red Dot Sight
Sport: Hunting
Item Weight: 4.16 ounces
Material: Aluminum
Compatible Devices: Rifle, Long Gun
Mounting Type: Picatinny Mount
Model Name: Ares
Manufacturer: Monstrum
Compatible Devices: Rifle, Long Gun
Mounting Type: Picatinny Mount
Reticle Type: Crosshair with Center Dot
Item Weight: 4.16 ounces
Color: Black
Product Style: Red Dot Sight
Material Type: Aluminum
Brand Name: Monstrum
Sport Type: Hunting
Model Name: Ares
Manufacturer: Monstrum
Number of Items: 1
Unit Count: 1 Count
UPC: 810088815911
Manufacturer Part Number: RD215B
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Sep 19
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
Dateline: A Lone Firing Range, Under the Harsh Glare of Predawn Lights, 1:04 AM. The air out here is still and heavy. It’s the time of night when your own thoughts become a little too loud, when the world seems to be holding its breath. It’s the perfect time for clarity. The perfect time to test a piece of hardware named after the God of War himself. The Monstrum Ares. A name with that kind of weight behind it had better bring the thunder. It’s an open reflex sight, a design that feels less like looking through a tube and more like having a targeting reticle tattooed directly onto your reality. There are no walls, no tunnel vision to hem you in. Just a wide, crystal-clear pane of glass that gives you an immense, god-like view of the world downrange. It feels expansive, almost liberating. You’re not just aiming a rifle; you’re commanding a field of fire. But the real voodoo, the piece of strange, dark magic that sets this thing apart, is the "Shake Awake" feature. When you set the rifle down, the little red dot, your singular point of ferocious intent, fades to black. The God of War sleeps. The optic lies dormant, conserving its energy, waiting. It’s a disconcerting sight at first, this black, empty screen where a moment ago there was a beacon. Then, you move. You snatch the rifle from the bench, you bring it to your shoulder, you so much as breathe on it too hard, and BAM. The reticle explodes back into existence. It’s instantaneous. There is no lag, no warm-up, no polite request for your attention. The god is awake, and he is ready for business. It’s a feature that feels less like engineering and more like instinct. The sight knows when you need it, and it answers the call before you’ve even consciously made it. Mounting it on a long gun felt right. It has a certain sturdiness, a sense that it can handle the violent, concussive argument of a rifle round without losing its composure. Shot after shot, the little red dot held its ground, a fixed point of reference in a chaotic world of noise and recoil. It didn't flicker, it didn't wander, it didn't complain. It just did its job. This isn’t just an optic; it’s a partner in the dance. It removes a step from the mental checklist. There's no fumbling for a power button in a moment of high-stakes urgency. You move, it wakes. It’s as simple and as savage as that. The Monstrum Ares lives up to its name, not through needless aggression, but through a state of constant, intelligent readiness. It’s a vigilant sentinel, a piece of hardware that feels less like a tool you command and more like an extension of your own nervous system. It’s waiting for the call, and believe me, when the time comes, it will be wide awake.
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Reviewed in the United States on June 6, 2025 by iamoverrated
Larger and heavier than I expected it to be, but it is heavy-duty metal (steel, not pot metal) and strong enough to hammer nails with. It has a large clear viewing lens with a thick metal ring protecting it, a bright target circle with crosshairs that shuts off after 10 minutes, and has a shake-awake feature that works great, eliminating the need to remember to turn it off or trying to turn it on when you need it. The finish is well-done, not fancy, but not cheap-looking. For the price, I bought 2 of them, and the more I play with it, the more I am impressed with its solid functionality. At first, I thought it a bit heavy and large for my 10/22, but it lines up great, easy to acquire sight picture with that huge viewing screen, and after getting used to it, the weight is really not noticeable when installed. Not sure how it will hold zero, as I haven't shot with it, but it is not a delicate piece of plastic or cheap sheet metal like others in this price range, I don't see how that would be a problem. It uses standard 2032 Li-Ion batteries. The elevation and azimuth adjustments are very nice, clickable and precise. I didn't want to like it at first, but it is pretty amazing for the price and have grown to like it. Good: Low price, solid metal, wide clear viewing port, shake-awake feature saves your battery. Not so good: Heavy, maybe a little too large for pistols.
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Reviewed in the United States on January 5, 2026 by Douglas Wallace
Picked up for a maverick 88 build that has the monstrum shell holder with pica-tinny rail to add an optic. Found that monstrum also had this affordable red for and after reading reviews gave it a shot. Install was straight forward with the pica-tinny mount. The buttons i can see why they moved in version 2. I picked this up knowing what i was getting but wanted to see if this optic can hold up to the recoil of the shotgun. It held up for sure with the low round count i ran it through. Holding zero so far. The reticle is easy to see and i agree there is some parallax as others have mentioned but its tolerable for my purpose. It helps get me on target and i was able to put shots where i wanted and aimed at. Adjusting the sight was easy and straight forward. Very impressed with this red dot sight and with the lifetime warranty, sold. I am definitely going to get version 2 Will update review in regards to durability and if there are any issues down the road of ownership. For now i am super pleased with a quality build optic thats well made and at a great price point.
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Reviewed in the United States on October 2, 2025 by Edward
Monstrum is getting good. This works great with my tool. Update: It broke after a few uses. As you can see it is in good condition. I used it like 5 times. Sad
Reviewed in the United States on July 14, 2025 by Bklyn226
Great build quality on a budget, love the shake awake and the brightness selection, looks great on rifles, the draw distance does well farther out, if you are using a braced pistol, well it isn't so good, the medical is blurry and is too large if it isn't far enough out on the rail, used it for my rifle instead, also the glass, even when the Laser is off is muddy and red-washed, buy for a budget, nor for an everyday use
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Reviewed in the United States on October 26, 2025 by T.green
Reticle quality is mediocre, functional for airsoft but that's about it. Would not use on a firearm. Reticle also "expands" in size the further away you are from it noticeably, so it's not great for anything other than a cosmetic fit with a suggestion of a reticle.
Reviewed in the United States on July 23, 2026 by Chancer
First I haven't got a lot of time as of yet but will update with progression. The fit and finish are top notch even on par with much higher priced units like eotech and holosun. the controls are very easy to manipulate and are quite intuitive in their function. The reticles defentley gets daylight bright and also checked the low brightness settings which where not visible to the naked eye in a dark environment , but functioned flawlessly when viewed thru my pvs-31 nvg . it didn't say in description or online but center dot is 2 moa with an 68 moa outer ring which is the same as eotech and numerous other optics the reticle is clean and has very good definition and sharpness. I 100% RECOMEND THIS SIGHT. no it's not an eotech but the price differences, unless you an operator and using it for deployments this fits the bill perfectly and will work for anybody wants to use it on the range home defense or any other use it's great are their any drawbacks not really would love for it to have a protective hood and a button for nvg use I own countless monstrum tatical products and their customer service is top notch and without the big price tag you reciever a lifetime warranty.
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Reviewed in the United States on January 21, 2025 by j s
My Monstrum Ares Open Reflex Red Dot Sight, is perfect! Some folks are 'optics snobs', and won't use anything but the high end scopes. I have awakened in the past year, to the fact that the average person does not have to spend $1,000+, to buy an EXCELLENT SCOPE OR RED DOT SIGHT. Monstrum scopes are VERY affordable, and of excellent quality... sturdy metal, flawless glass and reticle. with easy adjustments. Back to my Monstrum Ares Open Reflex Red Dot Sight in particular... the above applies to this red dot also. It is well constructed, yet light weight, has 8 reticle types, and 11 levels of brightness, and adjustments are very easy to make. And like all Monstrum products, it has a LIFETIME WAARRANTY! If you are reading this, you are obviously looking for a red dot sight, and I STRONGLY recommend the Monstrum Ares Open Reflex Red Dot Sight! Why spend $350 on a Holosun or Vortex red dot, when you can have a Monstrum Ares Open Reflex Red Dot Sight for <$35?
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Reviewed in the United States on January 18, 2025 by Gil