P320 Adjustable Straight Trigger System – Competition

(5 customer reviews)


The Grayguns Adjustable Straight Competition Trigger System for the SIG Sauer® P320 is a drop-in, enhanced trigger package with competition sear for your P320 that reduces trigger weight as low as 4 pounds while preserving all mechanical safety values. Includes our adjustable straight trigger, with built-in over-travel adjustment.

Specifically designed for P320s with current fire control unit components, or those who have gone through SIG’s Voluntary Upgrade Program. This system is for competition or range use only.

Available in standard black oxide, Titanium nitride (TiN) Gold, Nickel PTFE, Physical Vapor Deposition (PVD) Blue or PVD Coyote finish.

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The new Grayguns P320 Adjustable Straight Competition Trigger System delivers the unequalled smooth feel and hot performance of our custom action work in a cleverly engineered drop-in kit. For serious competition shooters, this is an excellent aftermarket upgrade.

Paired with Bruce Gray’s exclusive straight trigger design, this is the most advanced drop in competition system available for all post/Voluntary Upgrade P320 models.

The P320 Competition Adjustable Straight Trigger System is intended for installation by an armorer, gunsmith or skilled individual who is familiar with the P320 fire control unit. 

The kit includes the following exclusive Grayguns elements:

  • Our newly designed straight trigger with built in over-travel adjustment
  • Precision-ground custom sear, polished and finished in hard nickel PTFE. Specifically designed for competition or range use only.
  • Grayguns original competition sear springs
  • Intermediate competition sear springs
  • Original soft competition trigger bar spring
  • New snappy-reset trigger bar spring 
  • Micro-polished, extended safety lever pin

If you prefer, you can send your pistol to Grayguns for our P320 Competition Action Package, where we will install and tune it for you. 

Specifications and Features

  • Specifically intended for use only in P320s that have gone through SIG’s Voluntary Upgrade Program.
  • Reduces trigger pull weight to suit your preferences, with additional springs provided to yield custom pull weights.
  • Adjustable over-travel, stops at optimum trigger face angle
  • Smoother takeup and clean release sensation, with clean reset
  • Preserves factory sear face engagement height and mechanical safety values
  • Proven reliable and durable for high-volume professional use
  • Limited lifetime warranty on materials and workmanship


Black Oxide

  • Standard blued finish

Titanium Nitride (TiN)

A well-proven standard layer type through its balanced properties. The golden titanium nitride layer, abbreviated TiN, indicates the following properties:

  • High hardness and adhesion
  • Good chemical resistance
  • Good temperature resistance in air
  • Relatively low thermal conductivity
  • Attractive, golden color

Physical Vapor Deposition (PVD)

This state-of-the-art process creates a molecular bond to the trigger, resulting in a very durable finish. The PVD finish should not corrode, discolor or tarnish.

Nickel PTFE
Electroless Nickel PTFE (Teflon®) is an advanced, self-lubricating, composite coating that has PTFE particles co-deposited in the electroless nickel layer. Provides for a hard, uniform, self-lubricating coating for our premium aftermarket triggers.

Fit Guide

Fits all variations within the P320 (upgraded) system. Including all sizes, TACOPS Carry, X-VTAC, X-Carry, X-Five, Legion and RX versions.


These parts are intended for installation by a qualified armourer or gunsmith. In some cases professional fitting will be required by a trained, qualified armorer/gunsmith who is very familiar with the pistol’s action. This is due to the varying tolerances present in all mass-produced firearms. Although kits fit with no issues in a great majority of pistols, Grayguns is unable to guarantee perfect functionality in every instance. Grayguns does offer installation services for all parts kits we offer. Note – The safety lever spring is no longer needed in the P320, and is not included in the kit.

Additional information

Weight N/A
Dimensions N/A
Trigger Finish

Black Oxide, TiN Gold, PVD Coyote, PVD Blue, Nickel

Share your thoughts!

4.2 out of 5 stars

5 reviews

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What others are saying

  1. colby_register

    Best P320 trigger on the market

    colby_register (verified owner)

    This is by far the best trigger on the market for your P320. I’ve used the Apex trigger in several other sigs, and it doesn’t even compare. Yes, the difficulty of installation on this kit might not be for beginners, but I consider myself no more than a hobby-level gunsmith and I would rate this maybe a 3 on the difficulty scale (1 being easy, 5 being hard). There are plenty of good videos on youtube that walk you through it step by step, so don’t give something a bad review because you don’t possess the skills to install it…that’s what professional gunsmiths are full. This kit reduced my pull weight by a hair over 3lbs, but the real win is in the feel of the trigger. No more sloppy, spongy feeling. The trigger is crisp, breaks super consistently, and just gives you a lot more confidence in the firearm.

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  2. One person found this helpful
    Gabriel Shaw


    Gabriel Shaw (verified owner)

    For $150, I thought I was getting something that I could instal with moderate gunsmithing knowledge. Nope. This is the single hardest project I’ve ever worked on in 33 years of gunsmithing. Avoid. Avoid. Avoid and go Apex.

    Also, pretty shifty that you guys have to approve reviews… pretty sure that violates US consumer laws…

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    • Steve McGough

      Steve McGough

      Removing and replacing our competition sear and springs can be a challenge for some, but we’ve had thousands of customers – most not gunsmiths – successfully install the kit. We do suggest those installing the competition trigger kit be familiar with the inner workings of the P320’s fire control unit. There are a couple of excellent disassembly and assembly videos available. If you are willing to contact our customer support team – or have already done so – I would expect we would be able to provide some tips on installation. (We review all of the comments and posts on the site for language a couple of times per week and publish them.)

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  3. Jeremy Bonam

    Fantastic trigger

    Jeremy Bonam (verified owner)

    Very happy with this trigger system in my m17. It started off having a 6.5lb pull, and this trigger brought it down to under 3lbs. Installing it was pretty easy and straightforward. This also works with manual safety models as well as ones without the safety. I would definitely recommend this to anyone wanting a competition trigger in their p320.

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  4. mckersin

    Day & Night

    mckersin (verified owner)

    I know sometimes people exaggerate when they say day and night but not in this case! My P320 fired so smooth that a friend of mine who never shot before was hitting bulleyes. I had him shoot a stock M&P with a massachusetts 10 pound compliant trigger that belonged to the range then! I had him shoot my 320 and he was losing his mind. He fell in love with the gun. I fell more in love with the gun! The gun is even smoother now. The finish on the trigger also feels very nice on your trigger finger. Overall good experience and came in two days after hitting process payment.

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  5. One person found this helpful
    Jonathan Geralnik

    Excellent product and customer service

    Jonathan Geralnik (verified owner)

    Very nice trigger, easy adjustment. The trigger installation was a bit difficult, but the gunsmithing department was able to walk me through it and provided excellent service.

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