A few years back, I posted this on GTA and feel a replay may help some on this forum.
The Walther LGU is a magnificent gun and accurate as all get up. I feel it is vastly underrated and for one reason or another, it didn't take hold like the LGV has, but hey, that's the way it goes.
The weak area in the LGU is the trigger. There have been a few mods done like the "Yankee" trigger and the "tuning" trigger that have been successful in lightening up the factory original that pulls out the gun's accuracy potential. Here is mine.
I found the problem centers around the fact the original second stage non-adjustable pin it too close to the sear bar's pivot point which hinders the mechanical advantage of leverage. You simply have to put more pressure on the trigger to move the sear bar that gets the sear to break. So I added a second stage screw that is further away from the pivot pin (fulcrum if you may) giving a greater mechanical advantage to the entire set up and making the trigger pull as light and crisp as my HW97 with its Rekord trigger.
The mod itself is not very pretty. I filled the sides of the factory trigger with JB Weld and drilled a hole to accept a second stage screw. The screw in the picture was the experimental one and it is made longer in order to get a measurement for the final screw. The drawing is a rough approximation of the internal system just to give an idea of what takes place.
The blue line denotes the distance from the original factory second stage non-adjustable pin to the pivot point on the sear bar. The red line is the new, more leverage, distance to the pivot point on the bar with the new second stage screw installed.
As the trigger is pulled rearward, the first stage screw pushes the sear bar up until the second stage screw contacts the bar. When that happens, it is felt as a stop point at the end of the first stage pull. The next thing to happen, with the addition of a small amount of pressure, breaks the sear free. The two screws have to be carefully adjusted to achieve this balance, but when they are, you get a fantastic trigger with a light pull and sharp break.
I cleaned things up a bit and have been enjoying this trigger mod for quite some time now. Out to 40 yards, on a good day, the LGU can give my PCP's a run for their money.
The Walther LGU is a magnificent gun and accurate as all get up. I feel it is vastly underrated and for one reason or another, it didn't take hold like the LGV has, but hey, that's the way it goes.
The weak area in the LGU is the trigger. There have been a few mods done like the "Yankee" trigger and the "tuning" trigger that have been successful in lightening up the factory original that pulls out the gun's accuracy potential. Here is mine.
I found the problem centers around the fact the original second stage non-adjustable pin it too close to the sear bar's pivot point which hinders the mechanical advantage of leverage. You simply have to put more pressure on the trigger to move the sear bar that gets the sear to break. So I added a second stage screw that is further away from the pivot pin (fulcrum if you may) giving a greater mechanical advantage to the entire set up and making the trigger pull as light and crisp as my HW97 with its Rekord trigger.
The mod itself is not very pretty. I filled the sides of the factory trigger with JB Weld and drilled a hole to accept a second stage screw. The screw in the picture was the experimental one and it is made longer in order to get a measurement for the final screw. The drawing is a rough approximation of the internal system just to give an idea of what takes place.
The blue line denotes the distance from the original factory second stage non-adjustable pin to the pivot point on the sear bar. The red line is the new, more leverage, distance to the pivot point on the bar with the new second stage screw installed.
As the trigger is pulled rearward, the first stage screw pushes the sear bar up until the second stage screw contacts the bar. When that happens, it is felt as a stop point at the end of the first stage pull. The next thing to happen, with the addition of a small amount of pressure, breaks the sear free. The two screws have to be carefully adjusted to achieve this balance, but when they are, you get a fantastic trigger with a light pull and sharp break.
I cleaned things up a bit and have been enjoying this trigger mod for quite some time now. Out to 40 yards, on a good day, the LGU can give my PCP's a run for their money.
