If you have a Sig Sauer P365x, P365xl, P365 X-Macro, P365-380, Sig P365 9mm CA Edition, Sig P365 AXG Legion, or Sig P365 Fuse then you know it has an “Optics Ready” slide. This means the slide is milled out so you can bolt on a red dot sight.
Note* If you have a Sig P365 FUSE you will need these screws to mount an EPS Carry
What you might not know is exactly which red dot sights fit it. This can be confusing, but we are here to make it simple.
The P365x, P365xl, and P365 X-Macro, P365-380, Sig P365 AXG Legion all have the same optics footprint. The footprint is essentially the bolt pattern. Different red dots have different bolt patterns or footprints. The footprint on these Sig models is the Modified RMSc footprint.
Therefore you will need a red dot that has an Modified RMSc footprint.
The Holosun Red Dots we recommend for the Sig P365x, P365xl, P365 X-Macro, Sig P365 AXG Legion, or P365-380 are:
- Holosun 407K X2 Red or 407K X2 Green
- Holosun 507K X2 Red or 507K X2 Green
- Holosun EPS Carry Red and Green
- Holosun 507K ACSS Vulcan Red and Green
- Holosun SCS Carry
The Holosun optic line is a great value here’s why…
- They are affordable but not cheap.
- They are built sturdily with strong aluminum housings and glass.
- They have convenient features like Shake Awake and Side Mounted Batteries.
- They have a Limited Lifetime Warranty.
- They are reliable.
Holosun has two popular lines of red dot pistol sights. The “C” line and the “K” line. The “K” series is slightly smaller for more concealed carry and doesn’t have a solar panel. This is what fits on the Sig P365x, P365xl, P365 X-Macro, and P365-380.
The K series Holosun has a modified RMSc footprint. So it’s similar to an RMSc footprint but slightly different. For some pistols you need an adapter plate or some kind of modification but luckily for the Sig P365x, P365xl, P365X-Macro, and P365-380 it’s a direct fit - no modification is needed.
Here is some more detail about the Holosun sights we recommend for the Sig P365x, P365xl, P365 X-Macro, P365-380, and Sig P365 Fuse.
1. Holosun 407K X2 Red Dot
Buy the 407K Red At The Best Price
The 407K comes with a 6 MOA dot only. So it’s a little bigger than the typical 2 MOA dot, but that's pretty nice for close range.
Read our full 407K review here.
2. Holosun 507K X2 Red Dot
Buy the 507K Red At The Best Price
The 507K comes with the multi reticle system. Which is Holosuns circle plus dot combination. The 507K has a 32 MOA Circle with a 2 MOA dot. The multi reticle system lets you cycle through these so you can use only the 32 MOA Circle, or only the 2 MOA dot if you choose to do so.
The 32 MOA Circle gives the 507K a slight edge when picking up the dot upon drawing from your holster.
Besides those differences both optics are exactly the same. They have the same dimensions, the same batteries, same housing, etc. The only difference is the reticle and the 507K, when using the 32MOA + 2MOA Dot, is rated at 20k hours of battery life vs the 50k if using the dot only. The 407k is rated at 50k hours of battery life.
Read our full 507K review here.
3 & 4. Holosun 407K X2 Green Dot and 507K X2 Green Dot
Buy the 407K Green At The Best Price
Buy the 507K Green At The Best PriceBoth of these optics come in green dot versions as well. The science behind the green dot is that it’s easier for your eyes to pick up, some people say it’s brighter, and some people say it also helps with the “starburst” issue you encounter if you have any astigmatism.
Read our full 407K review here.
Read our full 507K review here.
5. Holosun 507K ACSS Vulcan Green & Red Dot
Buy the 507K ACSS Vulcan At The Best Price
The 507K ACSS Vulcan is exactly like the 507K except is has the ACSS Vulcan reticle. This reticle has a 230 MOA dotted outer ring and a 3 MOA center dot.
The purpose of this reticle is to help you find the center dot quickly if you are off center. To learn more about the ACSS Vulcan check out our article here.
The dotted outer ring can be turned off by holding down the "-" button for 3 seconds.
The main advantage of the ACSS Vulcan reticle is to be able to find the center dot quickly when drawing the pistol.
All the features are the same as the 507K except for the reticle, and this is available in both red & green.
Read our full 507K ACSS review here.
6. Holosun EPS Carry - Closed Emitter Option
Buy the EPS Carry At The Best Price
*Note: If you plan on getting the EPS Carry for your P365, it will mount directly to your slide with the included screws, however you will need to use the included adapter plate as the screws are slightly too long to sit down tight without it. If you want to eliminate the need for the adapter plate you can buy these EPS Carry P365 Screws which let you tighten down the optic without the need for the adapter plate.
Note* If you have a Sig P365 FUSE you will need these screws to mount an EPS Carry
The EPS Carry is very similar to the 407K and 507K except it has one major difference, it is an enclosed emitter optic.
This means the laser emitter is protected by a hood. So dirt, mud, or debris will never get in the way of the emitter to distort the reticle.
Read our full EPS Carry review here.
Features:
- MRS Reticle or 2 MOA Reticle or 6 MOA Reticle
- Shake Awake
- 50,000 Hr Battery Life
- Removable Side Battery
- IPX8 Waterproof
- 8 Daylight Brightness Settings and 4 Night Vision
- Aluminum Housing
- Enclosed Emitter
The MRS version has a solar panel on it which acts as a solar fail safe to power the reticle of the battery dies. It also gives you an extra auto brightness feature which can be toggled on or off.
7. Holosun SCS Carry Green Dot - Best Solar Recharging Option
Buy the SCS Carry At The Best Price
*Note: If you plan on getting the SCS Carry for your P365, it will mount directly to your slide with the included screws, however you will need to use the included adapter plate as the screws are slightly too long to sit down tight without it. If you want to eliminate the need for the adapter plate you can buy these EPS/SCS Carry P365 Screws which let you tighten down the optic without the need for the adapter plate.
The SCS Carry is similar to the EPS Carry in that it is an enclosed emitter, except it features Holosun's latest "Solar Recharging Technology".
It has an internal rechargeable battery with theoretical unlimited battery life. The battery has a 20K hour power reserve which is constantly being recharged. The optic charges the battery faster than it consumes. It has the MRS (multi reticle system) and is available in green dot only. You can use the 2 MOA dot, 2 MOA Dot + 32 MOA Circle, or 32 MOA Circle only.
This model doesn't have Shake Awake like the others, but recommend from Holosun, you just leave it on and it will stay on. It is constantly recharging from natural and artificial light sources. It does have a power off button if you wanted to turn it off.
This optic is a great option if you are looking for something super sleek, and where you never have to worry about batteries. Just turn it on and keep it on!
To buy these sights at the best price or to learn more about them check the links below.
- Holosun 407K X2 Red or 407K X2 Green
- Holosun 507K X2 Red or 507K X2 Green
- Holosun EPS Carry Red and Green
- Holosun 507K ACSS Vulcan Red and Green
- Holosun SCS Carry
Choosing between Red or Green Reticles
You may be wondering if you should get a red or green dot reticle. We get this question a lot so I am going to list a few bullet points for you to consider.
- Green reticles are less straining for the eye to see.
- Green reticles can help with astigmatism. If you have astigmatism you will see a blurry dot, we have been told by a few customers that Green dots help with their astigmatism, making the dot look more crisp than the red version.
- Green will not washout on backdrops like green grass, foliage, or green colors.
- In theory Green dots can have a longer battery life because Green is brighter, so for example a green dot on brightness setting 6 may be the same brightness as a red dot on setting 7 - which would save battery life.
If you want to learn more check out our full article about Red vs Green Dot Pros & Cons here.
Choosing between Open vs Closed Emitters
The simplest way we can break down open vs closed emitters is to look at how you plan on carrying the pistol. If you plan on being outdoors in the elements with rain, snow, sleet, then a closed emitter will be beneficial.
If you plan on carrying OWB most of the time and plan on being outside then closed emitter would be beneficial.
If you plan on carrying IWB or don't plan on being outside using your red dot in the pouring rain or heavy snow then an open reflex is fine.
Open reflexes will still work in the rain or snow but the closed emitter will give you extra peace of mind.
An open reflex can collect dust and debris on the inside of the reticle over time, so you'll want to clean it out from time to time. An enclosed emitter is easier to clean in this aspect.
To learn more about Open vs Closed emitters you can check out our Open vs Closed Emitter Guide here.
How to decide which reticle style is best for you
In this guide we covered a few different reticle options. If you need some help deciding which is best for you here are some of our thoughts on each.
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Conclusion
We hope you found this guide helpful, if you have any further questions please reach out to us on chat.
