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  • Post last modified:March 7, 2024

Here are the 6 best Sig P365 upgrades to improve the overall handling and performance of this amazing subcompact 9mm handgun.

I've shot and carried this gun for quite sometime to recommend these upgrades and eliminated ones that don't serve a performance boost purpose out of this list.

Best Sig P365 Upgrades

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Holosun 507K X2 - Faster Target Acquisition

p365xl mods

I've been using the Holosun 507K on my slim profile P365 for a while now, and it's made a significant difference in reducing the overall size for concealed carry. 

The 32 MOA reticle combined with a 2 MOA dot I find this combination versatile for both close and medium-range targeting.

p365 red dot sight

One of the standout features of the 507K is its long battery life with a side loading battery tray for easy access, similar to the Holosun 507C that I've also used. 

When it comes to drawing from a holster, the 507K excels with its snag-free performance.

The rugged exterior housing not only withstands wear against clothing but also ensures a smooth draw from both IWB (inside-the-waistband) and OWB (outside-the-waistband) holsters. 

Sig Custom Trigger - P365 Build Kit

sig p365 xl upgrades

This is the P365 trigger kit for anyone building a P365 from scratch. This is an all in one trigger with reduced power striker safety spring lowers the pull weight to 3.5 to 4 lbs after break-in, contributing to a lighter and smoother pretravel.

Improved trigger pretravel reduces the distance from the start of the trigger pull to the wall, allowing for a smoother and more controlled pull.

Improved sear engagement enables the shooter to adjust the wall/break feel and wall-to-break/reset distance 

The decreased trigger travel after the break means a more precise and accurate shooting experience.

Background check is required since it's a serialized part

Streamlight TLR 7 Sub - Low Light Illumination

sig p365 xl upgrades

We recommend the Streamlight TLR 7 Sub to be the first priority upgrade for Sig Sauer P365 to identify targets in the dark as well as see the sights if not using a red dot.

I've been using a small light that allows me to see my 9, 12, and 3 o'clock positions is quite impressive for its size.

Power-wise, it's efficient. It uses just one CR123A battery but can illuminate up to 500 lumens and 5000 candela to see things in the dark up to 30 yards.

The ambidextrous toggle switches are very responsive to activate the light especially during cold weather if my hands and fingers are freezing cold.

See detailed review here

PMM Compensator - Reduces Muzzle Flip

Adding a compensator to my P365 has greatly improved its performance, reducing muzzle flip by up to 30%, which is particularly beneficial during rapid fire or when precise shooting is needed.

However, not all compensators are equally effective; their performance largely depends on their design and engineering.

Few can compare to the P365 Comp Spectre's high standards. While compensators can enhance performance, they may also affect concealability and handling due to added size and weight, so choosing the right one is crucial.

p365xl mods

Highly recommend for both standard length and Sig P365XL models.

ZEV Slide - Optic Ready

best accessories for sig p365 xl

The ZEV slide is one of the best P365 slides to upgrade from the boring factory slide. 

Most aftermarket P365 slides are machined to accept popular red dot sights like Shield RMSc or Holosun 507K. 

Our favorite pick is the ZEV P365 Slide. 

True Precision Sig Sauer P365 Threaded Barrel, 1/2x28, Copper TiAlN, TP-P365B-XTC

We recommend the True Precision P365 threaded barrel to add a compensator or a suppressor.

An aftermarket barrel for the P365 can offer these following performance improvement:

  • Tighter lock up
  • Cooler design that shows when using a window cut slide
  • Improved accuracy
  • Threaded barrel can mount suppressor or compensator
sig p365xl upgrades

Using the Mischief Machine Omega steel frame grip on my P365 offers clear benefits and some considerations. The steel frame's increased stiffness enhances recoil absorption, especially with heavier ammunition, leading to a smoother and less snappy recoil experience. 

Combining this grip with a compensator further improves recoil management and control during rapid fire. The addition of an M1913 accessory rail adds convenience and versatility for attaching lights without adapters.

However, the added weight and stiffness may not suit all users, and considerations like cost and impact on concealability should be weighed before modifying the P365.