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Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Features
- IN THE BOX: Optix w/sheath, screwdriver, lens cloth, Battery, and three screw sets.
- AUTO BRIGHTNESS MODEL: A photosensitive sensor on the left side of the body provides dot brightness relative to ambient light conditions. The brightness adjustment is always on.
- COMPACT UNOBSTROCTIVE FIT: Shoehorned into this tiny scope is a 16mm x 16mm window, big enough for fast acquisition and sight tracking but small enough that it doesn't affect concealment.
- DUTY GRADE: Made from 7075 aluminum that is hard coat oxidized, shock proof to 1,500 G forces, and waterproof.
- DOUBLE THE LIFE: The CR2032 battery effectively doubles the battery life. Whether you choose Sentinel-M or Sentinel-A, expect two years of real-world battery life, even carrying your pistol all day, every day.
Brand: Swampfox
Color: Red
Style: Compact
Product Dimensions: 1.61"L x 0.91"W x 0.94"H
Sport: Hunting
Item Weight: 0.15 Kilograms
Material: Aluminum,Glass,Plastic,Polymer
Objective Lens Diameter: 16 Millimeters
Magnification Minimum: 1 x
Compatible Devices: Handgun, Rifle
Brand: Swampfox
Color: Red
Style: Compact
Product Dimensions: 1.61"L x 0.91"W x 0.94"H
Sport: Hunting
Item Weight: 0.15 Kilograms
Material: Aluminum,Glass,Plastic,Polymer
Objective Lens Diameter: 16 Millimeters
Magnification Minimum: 1 x
Compatible Devices: Handgun, Rifle
Mounting Type: RMSc Mount
Night vision: No
Reticle Type: Dot
UPC: 889157001517
Item Package Dimensions L x W x H: 4.29 x 3.07 x 2.32 inches
Package Weight: 0.15 Kilograms
Item Dimensions LxWxH: 1.61 x 0.91 x 0.91 inches
Brand Name: Swampfox
Part Number: SNL00116-RD-A
Date First Available: December 23, 2020
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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
Bought for a SAR 9X. Works great!
Reviewed in the United States on November 19, 2025 by Enrique Palma
This product fit extremely well on the item it was placed on. One thing to note is that it is battery operated. Initially you do not see the battery, however if the red dot stops illuminating you will have to remove some screws and replace the battery. My battery lasted around 4 years with constant use and I recently just replaced it and it was not that difficult to do so! No issues at all with this red dot!
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Reviewed in the United States on June 19, 2025 by Jasmine Jaramillo
Read a lot about red dots and wasn't sure it was going help novice shooters like me and the wife but it did. Part of the reasoning for going with the Sentinel was it fit on my wife's Glock 43X mos with no slide modifications or adapter plates that would make sit higher on the slide. Installed it myself which was dead simple and went to the range and got it zero'd in. After a few tips from the range guys on site acquisition to bring the dot into view, adjusting our trigger pulls and grip, we were able to hit a 6 inch circle from 15 yards pretty consistently where before we were all over the place at 7 yards. One disclaimer.... If you have bad shooting habits like we did, this won't solve those issues but it does remove the need to line up your front and back sites taking one of the variables off your plate.
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Reviewed in the United States on February 3, 2023 by Gerry Z
I was excited for the sentinel-a, auto brightness and it was the worst RDO I'd ever used. I returned it. I was just going to get the plate for my hellcat pro (Springfield tards) can't make a dang normal footprint, and get the Holosun 407k rmsc but I thought I'd try the manual sentinel shake awake. It was much better. The glass on the swampfox could be better, it catches a glare and the emmiter is a little fuzzy but overall it seems to work well. I'll update as I go. The auto was a disaster though. I run the tlr7 sub and in no light/ low light or intense bright light the sensor emmiter sucked. There was either visible dot, especially when I used the pistol mounted light or outside in bright light it was just a blob of red over doing it. Definitely don't have the Auto dialed in. The manual has been good so far and I can keep my co-witness. Overall I give the sentinel-m a 4, generously I trust it so far. Will update after 1k rounds.
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Reviewed in the United States on February 9, 2023 by Cory Martin
I mention the Hellcat Pro because the gunsmith installing it for me at first didn't think it would fit the Pro model. It fits well, looks great and seems easy to acquire the red dot. The packaging was nice and complete - they included 2 screw sets in case you needed different ones for your application. I haven't really had a chance to test accuracy but it was bore sighted for 10 meters. I have concerns over battery life and changing the battery by taking it off the gun. Too, I don't understand their warranty of 50,000 rounds although I doubt I'll ever reach that number. I ordered the Shield SMSc from Springfield but they took too long so I stuck with this sight. I hope I didn't make a mistake but so far, so good.
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Reviewed in the United States on December 17, 2022 by Larry Herzlich
Stopped working after a few months, sent out to swampfox for warranty and they stated that this isn’t an authentic optic and that this is not an authorized seller.
Reviewed in the United States on October 30, 2025 by Nick plescia
This is my first Swampfox optic, have Trijicon, Sig and Holosun optics on many other pistols and rifles, the quality is on par with those manufacturers, a little better than the Sig optics, about the same as Holosun I'd say. Nice crisp dot, love the auto adjusting feature, glass that is plenty clear and we'll see how that batter holds up as it does tend to err on the side of being a little brighter than I would have set it manually but that's not a huge deal. All in all, very satisfied for under 200 bucks.
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Reviewed in the United States on June 21, 2023 by William Ferrari
Direct bolt on for Glock 43x. I bought the unit that is always on, not the shake and wake. I didn't pay attention when checking out, and I didn't intend to purchase the unit with the "always on" feature. But I really like it! Guaranteed to last 50,000 hours, which is around 5 years? I can live with that! Fits easily into my IWB holster and doesn't affect how I carry it. It doesn't pinch you or poke you.
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Reviewed in the United States on February 14, 2023 by Mary K.