The Ultimate Guide to Choosing the RIGHT Streamlight TLR-7 Sub for Your Sig Sauer P365
Posted by Noah Ross on Jan 27th 2026
Read Before Installing A TLR-7 Sub On A Sig Sauer P365
If you’re outfitting a Sig Sauer P365 of any kind with a Streamlight TLR-7 Sub, the options can be confusing at first. In this blog, we are going to explain what you need to look for to ensure a successful installation.
Knowing The Sig P365 Rail
It is important to note that the TLR-7 Sub Rail Clamp labeled "Sig" is only compatible with the P365, P365X, and P365XL.
The Sig P365-XMacro is only compatible with the "1913" TLR-7 Sub Rail Key. This is because the XMacro, Fuse, and AXG Legion have a 1913-style rail while the original P365 variants do not.
So if you are planning to carry a P365 (of any kind) in our ARC Holster, it is important you use the correct TLR-7 rail key for your handgun. Otherwise, the gun will not fit properly in the holster.
TLR-7 vs. TLR-7 Sub — What’s the Difference?
Both the TLR-7 and TLR-7 Sub lights deliver solid performance for subcompact pistols like the P365-XMacro, but they’re built for slightly different purposes:
Streamlight TLR-7
- Designed for compact and full-size pistols
- Wider clamp fits many weapons, including the XMacro’s Picatinny rail
- Great choice if you plan to use the light on multiple guns
Streamlight TLR-7 Sub
- Built for subcompact pistols like the P365 family
- More compact and lightweight
- Offers a slightly sleeker profile for concealed carry
- Must choose the 1913 clamp version for the XMacro’s rail — the Sig-specific version won’t fit the X-Macro’s standard Picatinny rail without an adapter or custom key
For the XMacro, pick the 1913 model or compatible key kit that fills the rail slots properly — many shooters retrofit their TLR-7 Sub with a better-fitting 1913 key for a snug fit.
Why Add a Weapon Light to Your Sig P365?
Mounting a tactical light like the Streamlight TLR-7 Sub on your concealed-carry pistol offers major advantages:
- Improved low-light visibility
- Faster target identification
- Enhanced safety during unexpected encounters
Note: The P365-XMacro’s standard Picatinny rail makes it compatible with a range of lights — as long as you pick the right version.
Installation Tips & Common Issues
Many owners report that the light will mount on the P365-XMacro but may feel loose without the correct key or clamp insert. Some practical tips include:
- Use a 1913-rail compatible key or insert rather than the stock Sig-only hardware.
- Confirm the light clamps are tightened securely — a loose attachment can affect performance and safety.
- Consider holster compatibility when you install the light.
What This Means for You
The Streamlight TLR-7 Sub is one of the most popular choices for modern concealed-carry pistols like the Sig P365-XMacro — but picking the wrong version can lead to frustration and failure when you need it the most. Focus on rail compatibility first, then use case second.
✔ If you stick to the XMacro and want minimal bulk, go with the TLR-7 Sub (1913).
✔ If you swap your light between guns, the classic TLR-7 might make more sense.
✔ If you swap your light between guns, the classic TLR-7 might make more sense.
With the right setup, you’ll boost both visibility and confidence in any low-light situation — exactly what a tactical weapon light should do.
