Griffin ATM™ Barrel - Fits SIG® P365 - Threaded 1/2x28 - With Micro Carry Comp

Now: $195.95
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Griffin ATM (Advanced Threaded Match) Barrels are billet machined from 416R chromium stainless steel to exacting tolerances for the ultimate in drop in match performance.  5 axis machining done in a single work holding positions all critical dimensions on the breech ensuring theoretically perfect geometrical relationship of barrel, slide and locking lug. Chambers are honed and polished to ensure an extremely smooth surface finish and optimal reliability with a wide range of ammunition from training to duty ammo.  Two years of research and testing provided the appropriate knowledge to machine the barrel dimensions for a perfect fitment; providing the best possible accuracy without sacrificing factory reliability.  Designed with concealed carry users in mind, this barrel gives you the utility of accessory and suppressor support while providing uncompromising reliability.   Don't lose confidence in your carry handgun by using sub par components.  

For a limited time this barrel comes with our patent pending Micro Carry Comp, a $64.95 value and an impressive performance add on for your favorite carry piece.  The Micro Carry Comp ( MC²) provides a low signature (resists printing while carrying concealed), fits a wide range of holsters without modification, and provides noticeable recoil reduction for faster more accurate follow up shots with enhanced overall control of the firearm. The Micro Carry Comp's miniature and lightweight package has near zero perceived effect on the handling and storage of the firearm.   


  • 416R Pre- hardened chromium stainless steel for peak accuracy potential through service life
  • Compatible with Sig Sauer® P365
  • 9mm SAAMI-spec chamber
  • Black Nitride finish resists surface wear & corrosion while providing increased surface hardness
  • ½"-28 threaded muzzle for suppressor or accessory support
  • Target crowned muzzle
  • Honed and polished chambers to ensure reliable function across a broad range of ammo
  • Broach cut rifling for reduced stress and uniformity of the bore 
  • All critical machining done in single work holding for exacting tolerances and manufacturing consistency from batch to batch. 
  • 1:10 twist rate
  • overall length : 3.75" / with comp : 4.02" 
  • Micro Carry Comp torqued to 8ft/lbs

SIG SAUER® and P365® are federally registered trademarks of SIG SAUER, Inc. and is one of many trademarks owned by SIG SAUER®.  Griffin Armament is an independent manufacturer of parts and accessories that fit SIG SAUER® pistols; however it is not affiliated with or endorsed by SIG SAUER, Inc.  The use of SIG SAUER on this page is merely to advertise the sale of compatible parts or components.  

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11 Reviews

  • 5
    Sig 365 barrel/comp

    Published by Tim on 31st Oct 2022

    This barrel compared to the stock is far better. You can hear how much better the tolerance is compared to stock. The comp is also great. Sub guns can be very snappy and make for quick follow ups. This comp takes that snap away. Sure, it’s not massive but this thing doesn’t impact holsters, manual of arms, or spring settings yet takes some recoil out. The sig 365 feels more like a Glock 19 now. Highly recommend.

  • 5
    Sig P365 threaded barrel

    Published by Ed on 19th Oct 2022

    Haven't shot this barrel yet. But have one just like it on my G19 and it is awesome. The comp does make a difference.

  • 5
    P365 threaded barrel

    Published by Sam X C on 4th Aug 2022

    Shipping was fast.looks nice..fits good..after 50 rounds shoots it!!

  • 5
    P365 barrel & micro comp

    Published by Robbase on 3rd Aug 2022

    Great barrel I recommend

  • 5
    A great barrel!!!

    Published by djMinWah on 25th Sep 2021

    Fired my P365 with this barrel and it works great. I don't notice as much flip as I would with the stock barrel. It does not extend far out and the entire system is easy to install. I'm not the best shot but when trying this out it did appear to tighten up my groups. An excellent upgrade to your firearm. Recommended.

  • 5
    Barrel & micro comp

    Published by AD on 31st May 2021

    Great barrel and micro comp package for around same price as most aftermarket barrels. I shoot awesome groups with this installed, far superior to the regular 365 barrel. Also fits in the same holster!

  • 5
    Great barrel and mini comp

    Published by skylar bedier on 4th May 2020

    Griffin shipped my items really quick, I test fit them and the barrel lockup was great and didn't look like it had any issues. I went to the range and it was a pretty noticeable change from stock. Very happy with my purchase, I've told my friends to check these guys out for sure!

  • 5
    Top Quality As Usual!

    Published by Ted on 2nd May 2020

    This is an easy upgrade for your P365. Drops right in, perfect fit and excellent quality. The micro comp is a nice touch and it looks great. I will say that with the micro comp installed, this barrel adds exactly 7/8" to the length of the gun. I pocket carry and can still use the same holster. I would recommend this barrel to every P365 owner!

  • 5
    Griffin threaded barrel Sig P365

    Published by Kenneth Lumley on 1st May 2020

    Exceptional value, construction, design and functionality. Great job!

  • 5
    Great purchase!

    Published by Alexander Rodriguez on 1st May 2020

    Great quality! Makes P365 look great!

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