How do I adjust the LXX trigger pull on my Mark V rifle?

The MARK V® trigger assembly has a pull weight adjustment screw. The adjusting screw on the bottom of the trigger assembly adjusts for the weight of the trigger pull, and is for your use. The LXX trigger is adjustable down to a weight of 2.5 lbs. when the screw is fully backed out and not applying compression force on the trigger spring.

WARNING!! Do not attempt to adjust sear engagement, make any adjustments other than as described below, or modify the trigger assembly in any way. Improper adjustment or modification of any firearm trigger assembly can result in the firearm discharging prematurely due to a “hair trigger.”  Thus, any minor bumps or movement can possibly result in an accidental discharge, and cause serious injury or death. The trigger assembly has been set at the factory for weight of trigger pull appropriate for most shooters. If you require a heavier or lighter weight of trigger pull, adjust as follows:

1. Keeping the muzzle of the rifle pointed in a safe direction and your fingers out of the trigger guard and away from the trigger at all times, unload the rifle with the following procedures:

Move the safety lever to the forward position to unlock the bolt. Raise the bolt handle and pull the bolt to the rear to extract and eject any chambered cartridge. Place one hand under the floorplate to catch cartridges to be removed from the magazine. With your free hand, press the floorplate release to open the floorplate and remove any cartridges from the magazine. Reposition the magazine follower inside the magazine and close the floorplate. Visually double check the chamber and the magazine to make sure there are no cartridges remaining in the rifle.

2. Removal of stock is not necessary. The socket cap adjusting screw is accessible through the opening in the trigger guard, just forward of the trigger.

3. To increase weight of trigger pull, with a hex key (Allen-type) wrench of the proper size, turn the bottom socket cap screw clockwise (when viewed from the bottom) until desired weight of trigger pull is established.

To decrease weight of trigger pull, with a hex key of proper size, turn the bottom socket cap screw counter-clockwise (when viewed from the bottom) until desired weight of trigger pull is established.

NOTE: For safety reasons, weight of trigger pull will not be adjusted below three pounds from the factory. To determine trigger weight requires use of a trigger scale.

4. After adjusting the trigger to the desired weight, engage the safety and pull the trigger to its limit. Release it slowly to ensure that it returns to the forward position. If the trigger does not return to its position, you have adjusted the trigger pull too lightly.