Adjusting the Trigger Pull on the Sig Sauer Cross Magnum Sawtooth
The KMRNL Sawtooth .300 PRC, built on the Sig Sauer Cross Magnum platform, features a factory-installed 2-stage adjustable match trigger. This trigger allows for fine-tuning the pull weight between approximately 2.5 to 4 pounds without disassembling the rifle. In this guide, we’ll walk through the process of adjusting the trigger pull using a Lyman Mechanical Trigger Pull Gauge.
🛠️ Tools Required
T15® Torx driver
Lyman Mechanical Trigger Pull Gauge
A safe and clear workspace
⚠️ Safety First
Before making any adjustments:
Ensure the rifle is unloaded:YouTube
Remove the magazine.
Open and lock the bolt to the rear.
Visually and physically inspect the chamber to confirm it’s empty.
Point the rifle in a safe direction at all times.
🔍 Locating the Adjustment Screw
The trigger adjustment screw is located inside the trigger guard, just forward of the trigger shoe.
Use a T15® Torx driver to access this screw through the opening in the trigger guard.
🔄 Adjusting the Trigger Pull
The single adjustment screw controls the total trigger pull weight, affecting both stages simultaneously.
To Decrease Pull Weight:
Turn the screw counterclockwise.
To Increase Pull Weight:
Turn the screw clockwise.
Important: Do not force the screw beyond its natural stop, as this can cause internal damage to the rifle.
📏 Measuring with the Lyman Gauge
Set up the Lyman Mechanical Trigger Pull Gauge according to the manufacturer’s instructions.
With the rifle secured and pointed in a safe direction, place the gauge’s hook on the center of the trigger shoe.
Apply steady, even pressure until the trigger breaks.
Note the reading on the gauge:
The large outer numbers represent pounds (lbs).
The smaller tick marks between the numbers represent ounces (oz), typically in 2 oz increments.
Repeat the measurement several times to ensure consistency.
🎯 Fine-Tuning the Trigger Pull
Based on your preference and shooting application:
For a lighter trigger pull (closer to 2.5 lbs), turn the adjustment screw counterclockwise in small increments, measuring after each adjustment.
For a heavier trigger pull (up to 4 lbs), turn the screw clockwise, again measuring after each change.
Continue this process until the desired pull weight is achieved.
✅ Final Checks
After adjustment, perform several dry-fire tests to ensure the trigger operates smoothly and safely.
Confirm that the trigger reset functions correctly.
Re-verify the pull weight with the Lyman gauge to ensure consistency.