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Q&A for Swampfox Sentinel II 1x20 Dot Sight — 48 Questions & 24 Answers

Name Swampfox Sentinel II 1x20 Dot Sight (4.6)
As Low As $249.00 Save 11%
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Q
Way, member, from NY, United States, asked on April 17, 2024

Is the battery top or bottom mounted ?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on April 18, 2024

The Swampfox Sentinel II 1x20 Dot Sight houses the included 2032 battery on the underside of the optic.

2 of 7 found the following answer helpful.
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Q
Brian G, guest, from CO, United States, asked on December 03, 2025

Will this fit an Alpha Foxtrot AF1911 E with RMSc cut?

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on February 19, 2026

Yes. The Sentinel II uses the RMSc footprint, so it will mount directly to an RMSc-cut AF1911 E slide using the appropriate mounting screws.

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Q
Greg, member, from NC, United States, asked on November 22, 2025

Will this fit my Glock 43x without needing a plate?

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on February 19, 2026

Yes. The Sentinel II uses the RMSc footprint, and the Glock 43X is cut for the RMSc pattern, so it will mount without a plate with the correct mounting screws.

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Q
Jogger, guest, from TX, United States, asked on November 11, 2025

Will this work on. FNX 40 S/W

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on February 19, 2026

No. The FNX-40 S&W does not come from the factory with an RMSc optics cut, and the Sentinel II uses the RMSc footprint. You would need either a slide cut for RMSc or a compatible adapter plate to mount the Sentinel II.

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Q
Stormie, guest, from MO, United States, asked on November 11, 2025

Will this fit the kimber cds9

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on February 19, 2026

Yes. The Kimber CDS9 is cut for the RMSc footprint, and the Sentinel II uses the RMSc pattern, so it will mount directly without a plate using the correct mounting screws.

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Q
Thomas, guest, from NY, United States, asked on November 07, 2025

Will this fit a M&P9 M2.0?

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on February 19, 2026

No. The M&P9 M2.0 is cut for the RMR footprint, while the Sentinel II uses the RMSc footprint, so it will not mount directly. An adapter plate or an RMSc-specific slide cut would be required.

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Q
Pierce, member, from FL, United States, asked on September 12, 2025

What plate would I need to mount it to a hk vp9?

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on February 19, 2026

You will need HK optics plate #4. The Sentinel II uses the RMSc footprint, and plate #4 is the correct factory plate for mounting RMSc-pattern optics on the VP9.

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Q
Clark, member, from GA, United States, asked on August 13, 2025

Will it fit a 2011 slide?

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on February 19, 2026

The Sentinel II uses the RMSc footprint. Most 2011 slides are not cut for RMSc. While adapter plates do exist that can convert some common 2011 optic systems to RMSc, fit and reliability can vary depending on the slide and plate combination. For the most secure and reliable setup, the slide is typically best milled directly for the RMSc footprint.

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Q
Cj, member, from TX, United States, asked on May 14, 2025

Will it fit the hellcat pro

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on March 02, 2026

Yes. The Sentinel II uses a standard RMSc footprint, which matches the Hellcat Pro’s optics-ready slide pattern and will mount directly without an adapter plate.

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Q
RJ, guest, from IL, United States, asked on April 28, 2025

Will this fix a hellcat osp

Manufacturer Answer
A
Answered by Swampfox Optics, Manufacturer from CO, United States, on March 02, 2026

Yes. The Hellcat OSP slide is cut for the RMSc footprint, and the Sentinel II uses the RMSc footprint, so it will mount directly without needing an adapter plate.

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