Sentinel
Sentinel (Gen 1) is a Swampfox Legacy Series optic and no longer in production. For the latest, check out our second-generation Sentinel II.
Sentinel is a "micro" pistol red dot sight with an RMSc footprint designed for use on micro handguns. These sights are available in either red or green illumination and feature auto-illumination. The 16mm window, paired with a durable, thin hood, provides a wide field of view, making it easier to transition from target to target. Constructed from 7075 aircraft-grade aluminum, Sentinel is built to withstand tough conditions and is optimized for everyday carry (EDC) use. Sentinel is the edge in shooting accuracy you’ve been looking for.
Sentinel Gen 1 retail value: $139
SKULE-SNL00116-RD
This is a legacy product and is no longer available for purchase.
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CLEAR | PRECISE | TOUGH
Durability you can rely on
Sentinel Micro Reflex Sight
Pistol red dots have become a standard in EDC for good reason. Many handguns now come with an option for an optic cut from the factory. These simple upgrades offer an advanced and faster method of aiming compared to standard iron sights. When paired with the appropriate height iron sights, you get the best of both worlds.
AUTOMATIC ILLUMINATION
The current Sentinel HOT DEAL models feature automatic illumination only. A light-sensitive sensor on the left side of the optic continuously adjusts brightness to match your environment for optimal visibility in varying light. Note: The remaining Legacy Series “Hot Deal” Sentinels in stock are automatic-illumination only. Manual models are no longer available. Automatic models do not include Shake N' Wake, as the sensor is always active and the optic does not shut off.
ILLUMINATION LIFE
The Sentinel's emitter projects a 3 MOA dot in either red or green. To maintain a durable construction for the optic body, the battery compartment is located on the bottom of the housing. This bottom-loading design, as opposed to a top-loading or side tray system, has allowed for extended battery life using a CR2032 battery. Whether you choose the Sentinel-M or Sentinel-A, you can expect two years of real-world battery life, even with everyday use.
A BUILD WORTH TALKING ABOUT
Many other red dots of similar size are made of more fragile materials such as plastic and polymers. Sentinel, on the other hand, is constructed from CNC machined 7075-T6 aluminum, hard-coated with a matte black finish. The multi-coated glass used in Sentinel is of the same quality used in our high-end long-range precision rifle optics ensuing you will have the best glass clarity we have to offer.
IF IT FITS, IT SITS
Sentinel's design is specifically tailored to sub-compact and micro-compact handguns. Standing at approximately an inch tall, an inch wide, and 1.6 inches long, Sentinel is the smallest dot in our lineup. With a 16mm x 16mm window, the shooter has a wide field of view for acquiring the target quicker. Sentinel is compatible with a wide range of firearms including the Glock 43x and Glock 48 MOS, Sig P365 XL, Springfield Hellcat OSP, Canik Elite SC, S&W Shield 2.0 Optics Ready, Walther PPS M2 Optics Ready, and many other slimline slides with an RMSc footprint.
PUT THROUGH THE PACES
One of the biggest drawbacks of mounting a red dot on some popular sub-compact handguns is the loss of rear iron sights. But not to worry, we've put Sentinel through rigorous testing to ensure its reliability. Sentinel has an IPX rating of 7 when used with the waterproofing plate and can withstand a shock rating of 1500 G, ensuring it will perform under tough conditions.
Technical Data
SENTINEL SPECS
| MOA Adjustment | Dial |
| Dot Size | 3 MOA |
| Magnification | 1x |
| Lens Diameter | 16mm |
| Illumination Positions | Sentinel-M: 10 (no longer available for sale) Sentinel-A: Continuous adjustment |
| Brightness Adjustments | Sentinel-M: Up/Down Digital Press (no longer available for sale) Sentinel-A: Photosensitive sensor |
| Shockproof G Forces | 1500Gs |
| Waterproof | 1 Meter/ IPX7 |
| Battery Type | CR 2032 |
| Max Battery Life | Approx 2 years real world |
| Dimensions | 1.61”(length) * 0.91” (width) * 0.94”(height) |
| Weight | 0.62 oz |
| Lens | Multi-Coated Ruby Red - Red Dot Multi-Coated Silver - Green Dot |
| Specialty Coatings | Anti-fog, hydrophobic, anti-scratch |
| Parallax | Parallax free @33 yards |
| Eye Relief | Unlimited |
| Mount Type | RMSc footprint |
| Chassis | 7075 Aircraft grade aluminum |
| Windage/Elevation Movement Range (MOA) | +/- 35 MOA/ Total 70 MOA Range |
Choose Your Reticle
Available Reticles
SENTINEL RETICLE
Swampfox Sentinel features a 3 MOA red or green dot reticle powered by a high efficiency emitter. Switching your sight picture from blocky iron sights to a 3 MOA dot equivalent to just 3 inches at 100 yards provides a much more precise point of aim, resulting in a very real accuracy bonus even with subcompact pistols.
VITAL STATS
Sentinel features a 3 MOA red or green dot enclosed in a window measuring 16mm wide and 16mm tall. Sentinel fits all RMSc footprint slides and mounts. Sentinel’s 7075 aluminum body measures 0.91” wide and 1.61” long. Sentinel is very easy to conceal while still providing a window size large enough to preserve sight acquisition speed when fractions of a second count.
THE ADVANTAGE OF TARGET FOCUSED SIGHTING
Micro compact sized concealed carry pistols are notoriously difficult to shoot accurately due to their extremely short sight radius. Having to focus on the front sight to assure an accurate shot in a defensive shooting situation is an additional burden.
Sentinel’s 3 MOA dot is focused at infinity so you can forget about focusing on the gun entirely, and focus on the threat, which is what you’ll be inclined to do anyway. With a sharp crisp dot superimposed on the target, you can make a wiser decision about whether to fire and make those critically important shots more accurate as well.
Package Contents
In the Box
6 Items
- Optic with sheath
- Screwdriver
- Lens Cloth
- Battery
- Three screw sets
- M4 x 0.7 x 10.1mmM4 x 0.7 x 8.6mmM3 x 0.5 x 12.0mm
Customer Feedback
Reviews
859 Reviews
I have a Sentinel A greendot on my hellcat. I love it as I have never had any issues with it and it always works! I went to shoot it the other day and the glass was cracked. I went to the Swamp Fox website, submitted a claim, and within a week, i had a new one! They didn't ask any questions at all. Thank you Swamp Fox! Great service!
Cody Hancock · Aug 30, 2026
The Sentinel is one of the best sights bang buck. I have also purcchased it in the green dot and manual adjust red dot. I prefer the Green Auto and wish Swampfox would bring it back but even with the red dot it's a great sight for thinner pistols.
Jason K · Aug 20, 2026
It is an amazing optic! The install and fit was easy and included tons of hardware. The glass stays clean and clear even after being subjected to temp changes and lint from clothing. The shake away feature and brightness of the dot were excellent as well. Overall 9.9/10. The .1 was because the body of the optic was just ever so slightly larger than expected and the co-witness wasn't a perfect true but that's very slight and honestly still works amazingly.
Andrew Garay · Aug 17, 2026
Customer service from this company is the best I’ve ever experienced after my son dropped and shattered the optic. I went to return it for a refund and accidentally sent it with the wrong shipping label and still got the optic replaced. five stars for sure.
MATT C · Verified Buyer · Jan 9, 2024
The products are very good but as with anything issues may arise. So I am very pleased with the warranty service, no hassle warranty.
FJH · Verified Buyer · Jan 9, 2024
Awesome sight. I purchased this sight to test out the idea of an optic on a carry gun and it sold me on the concept. The quality of the Sentinel is outstanding.
JONATHAN Y. · Verified Buyer · Jan 9, 2024
Excellent optics, I have many SF optics from LPVOs to many on top of pistols. I have only had one issue with brightness selector button. SF customer service literally went above and beyond to make sure I received exactly what I needed. I cannot say enough about this company and their proven products.
DEAN W. · Verified Buyer · Jan 9, 2024
Mounted the Swampfox Sentinel on my EDC and wore it daily, even when I was mowing the lawn. After about 8 months of constant use, the green dot died. I contacted Swampfox customer service, sent them the sales receipt and unit Serial #, and they replaced the unit at no cost to me. The new unit is now sighted in and on my 4 o'clock once again. I love this green dot. Thank you Swampfox!!!
FLIP R. · Verified Buyer · Jan 9, 2024
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