P365 & P365XL Compensator with Barrel

(4 customer reviews)


The custom Grayguns P365 Compensator is a practical, performance system for your SIG Sauer® P365 and P365XL 9mm pistol. The P365 Compensator kit includes everything you need, including a threaded True Precision barrel and compensator. Components are sold only as a system, and you can not purchase the compensator alone.

Our compensators are specifically designed for use with factory OEM SIG slides.

Due to the threaded barrel, this product may not be shipped to California, Connecticut, New York or Washington, D.C.
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Our P365 Compensator softens recoil and flattens muzzle flip yet only adds 1 inch (1.023″) to the overall length. We’ve designed the comp to ensure it will run reliably with your factory recoil spring. Our clever CompLock index and locking system ensure your SIG Sauer P365 compensator aligns perfectly and stays put.

Components are sold only as a system, and you can not purchase the compensator alone.

P365 Compensator Kit Includes

  • Grayguns True Precision 9mm Barrel
  • Compensator
  • Set screw
  • Positioning detent
  • Allen wrench
  • Red Loctite® for barrel threads

P365 Compensator Specifications

  • Custom, Grayguns True Precision barrel, Diamond-Like Carbon (DLC) finished for maximum service life
  • Machined from the 7075-T6 aluminum alloy and finished in DLC to complement your factory slide
  • The innovative CompLock index system assures perfect alignment and durability
  • Adds only 1.023 inches to length; passing the reality check
  • DutyComp is optimized for reliable function with defensive ammo using the factory recoil spring assembly; no iffy replacements are required
This compensator is not intended to be removed every cleaning. Refrain from removing and reinstalling the compensator from the barrel unless necessary. If you remove the compensator, ensure you clean all threads of old Loctite before reinstalling with fresh Loctite.

Fit Guide

The compensators are designed to be used with SIG factory slides and may not work with third-party slides, including our Modern Classic slides.

  • P365 and P365X – 9mm caliber only
  • P365XL – 9mm caliber only

Additional information

Weight N/A
Package Dimensions N/A
Pistol Model

P365 9mm, P365XL 9mm

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4.75 out of 5 stars

4 reviews

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What others are saying

  1. Jason Layne

    Added Compensator

    Jason Layne (verified owner)

    Ordered the New threaded barrel and compensator to my P365 and I couldn’t be more pleased. Package shipped the same day and arrived 4 days later. Installation was easy and took maybe 15 minutes. Improved sight line, target acquisition, and my groupings are closer with double taps as the muzzle rise is more controllable. The machining of the product is excellent and overall this is a quality product.

    Photo has been removed

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  2. andy pazillo

    andy pazillo (verified owner)

    I ordered the 365xl barrel comp combo I talked with Cris who was very helpfull. I am a reloader and worked loads with cfe pistol that were very accurate and the single port comp worked great. With Grayguns shipping always is out standing just fast. I also would like to thank Mr. Gray for veteran discount as I am a vietnam vet. I also worked with a 1911 pistolsmith in my area Steve Nastoff learning the ins and out of the 1911 comp guns. I can say Mr. Gray himself is a great pistolsmith and shooter. So when ordering from Grayguns you will get a great product and service Thanks Andy

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  3. One person found this helpful

    Great - Just understand it requires premium/defense ammo to run

    texmccloud (verified owner)

    This was a P365XL model, with a 507K mounted. Runs perfectly with all +P, Premium defense ammo I tried. Tested with GDHP, (40 rounds 124gr +P, 40 rounds 124gr Short Barrel, 20 rounds 124g Standard, 60 rounds 147gr standard), 60 rounds 135gr +P Critical Defense – all of these had zero malfunctions. Also works well with Winchester Super Suppressed 147gr FMJ, had 1 failure to eject out of 300 rounds – and it is not appreciably louder than a P365X shot side-by side. Felt recoil reduction was not really perceivable, but I did notice the dot spent more time in the window during recoil than with the P365X without the comp, so it does the job – B8 at 25 yards was easy. One thing to understand going in however — this will not cycle most common range ammo at all. I experienced 100% malfunctions with 115gr and 124gr FMJ Winchester White Box as well as 115gr FMJ American Eagle. With Hornaday 125gr Steel Match HAP, about 1 round per magazine cycled on a 100*F day. Grayguns recommends 124gr or heavier Blazer Brass and S&B as an economical range choice if you are not using premium defense ammo, but haven’t tested those yet. Since this specific pistol is more of a recreational/utility gun for the wife than a defense gun; she doesn’t CC, simply prefers the P365 to full-size guns due to hand size; the inability to run any of the cheap range ammo I already have cases of is a real bummer… but this probably won’t impact the typical buyer who is going to only run premium defense or +P. This is not a ding on Grayguns, it’s just a thing with most all compensators — they need the gas of hot ammo to work well normally so it should not have been surprising to me. I just didn’t realize the P365XL doesn’t have any aftermarket springs available like my X5/VP9 etc to tune to run well with minor ammo through a compensator. My lesson learned is rather than comping my carry P365X, I’m just going to get a P365XMACRO Comp with all the issues worked out from the factory and swap the frame out for a Wilson Combat XL.

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  4. jjorgenson

    Sig Sauer P365XL Compensator works better than expected!

    jjorgenson (verified owner)

    I love it! The compensator and barrel are of high quality. Performs excellent. The wife, who hates shooting the P365XL, noticed a huge difference in recoil reduction.

    Delivery came sooner than expected which is always a bonus when waiting for new gun stuff!

    If you’re in the market for a compensator. This is your last stop!

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Many parts sold by Grayguns - including but not limited to triggers, trigger kits, internal components and spring kits - are intended for installation by a qualified armorer or gunsmith who is familiar with the firearm.

Although kits fit with no issues in a great majority of pistols, Grayguns cannot guarantee perfect functionality in every instance.

Due to varying tolerances present in all mass-produced firearms, professional fitting by a qualified armorer who is familiar with the pistol's action may be required.

Grayguns offers installation services for all parts kits we offer. If you have any issues or questions about the installation process, STOP IMMEDIATELY and contact the Grayguns Customer Service Team.