Exclusive upgrades from Keres Dynamics LLC. These parts are engineered for use in SIG SAUER® P320 and M17 Pistols. All Keres Dynamics parts are designed, tested, and manufactured in the USA.

Keres Dynamics’ P320 PRO ADJUST – Adjustable Flat Trigger patent pending design is the first to allow you to adjust both trigger pre-travel (take-up) and over travel. Overall trigger travel can be reduced by up to 60%, providing a short crisp trigger pull and reset. The increased leverage reduces the trigger pull by up to 25%. Our design features a center rib and curved tip to provide fast and consistent indexing.

Available in Black & Silver hard anodized finish.

  This trigger is designed specifically for P320s which have been processed through Sig Sauer’s voluntary upgrade program or newer. It is highly recommended that the Keres Dynamics PRO ADJUST trigger be installed by a licensed gunsmith or Sig Sauer certified armorer.  Improper installation and/or adjustment may cause product failure, resulting in injury or death.  It is the sole responsibility of the firearm user to ensure the firearm is in a safe operating condition at all times.  Installation of this trigger may void the factory warranty on the firearm.


At Keres Dynamics, we recognize a number of customers were concerned with the military drop test results of the P320. While SIG addressed the issue with their upgrade program, we wanted to design our parts to be as light or lighter than the factory upgraded triggers but with the same strength and reliability. In our research, we came upon Tennalum® 7068-T6511 aluminum. Tennalum® gives our parts greater strength than 4130 chromoly steel, but with the lighter weight of aluminum. By comparison, Tennalum® is nearly 250% stronger than 6061 aluminum, but only 1/3 the weight of 4130 steel. This made Tennalum® an ideal choice to achieve our design and performance goals while maintaining the light weight necessary to meet or exceed the drop test standards placed on the P320 for service. Because of this material selection, we are able to manufacture a feature-rich, adjustable trigger that is 1/2 the weight as the factory trigger, but just as strong.


Keres’ PRO EXTEND magazine release features a patent pending design that improves magazine release access and indexing, allowing for faster magazine changes with enhanced ergonomics and comfort.

SIG Sauer produced two different version of their magazine release for the P320. Keres Dynamics is proud to offer our PRO EXTEND magazine release in two generations to be compatible with both SIG Sauer designs. To identify which version you have, look for the following:

  • There is a dimple on the side of frame where the access port is located for removing the magazine release.
  • With the factory magazine release removed, compare the cutouts at the end opposite of the thumb pad to the diagram shown here.


Lifetime Replacement

At Keres Dynamics we stand behind the quality and durability of our products. Our products are designed to be used in some of the toughest environments on the planet. As part of this commitment to quality, we extend a no-BS lifetime replacement warranty to any Keres product. If your Keres product fails, is worn out, or is run over by a HEMTT, we will replace it. Period.

*The views and opinions expressed on this website are solely those of the original authors and contributors. These views and opinions do not necessarily represent those of Spotter Up Magazine, the administrative staff, and/or any/all contributors to this site.

By Mark Miller

Mark Miller is a Green Beret who served in Afghanistan and a number of other live fire locations. He's a poet-warrior in the classic sense, a casual hero and a student of science.

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