Unable to find anything on the web about how to disassemble this lovely gun, I decided to take one apart and make a guide myself. Now… since I was busy enough while taking it apart, remembering where stuff should go, I made this as an assembly guide. You can sort of read it backwards if you want to know how to take it apart.
This article covers the lower part.
Lower with no parts attached, except the main pin spring, that I didn’t bother to remove.
Insert the searspring and holder into the hole in the side of the block.
Now the sear must be inserted. The sear spring and pin will block it going down, so push it in with something that fits into the hole. You will have to push it quite far back, as the sear will need to turn a bit to go around the block, and snap into place as you release the sear spring.
The sear holder goes into the hole from the other side of frame. It has a loose fit, and it is easier to put it into place later. (It will fall out easily until the gun is almost finally assembled.)
Insert the trigger spring and rod at the same time into the hole in front of the trigger “area”. This will need to be inserted now, as it can not be done after the trigger. (At least I could not figure out how to. It would make everything easier.)
The trigger bar is an annoyance as it needs to go quite high for the trigger to go into the block. It’s a bit counter intuitive, but easy if you just don’t worry about the trigger bar until later.
If you are reading this guide backwards, for dissambly, this is also the part where you need to be careful not to lose the Trigger bar spring.
This part is a bit difficult, and you’ll probably need a few attempts to figure out exactly where everything should go. You need to do a lot of stuff at once.
Hold down the trigger spring rod, with a small screwdriver or something. It’s quite a challenge to do it while fitting the other bits, so pick a tool that wont slip too easily.
While holding it down insert all the “trigger bits”, and position them so that you can insert the trigger safety pin. Only insert if halfway, as you will need to move the trigger safety spring to the other side of the trigger safety pin in the next step.
Now that the trigger safety pin holds all the lose parts together, move the trigger safety spring to the correct position, and push the trigger safety pin all the way through.
The trigger will not function yet, as the safety will be in effect all the time. So in case you test it at this step, don’t worry.
Insert the trigger safety pin stop(which is just another pin …) as well. Also here remember to move the trigger safety spring to the correct position. The trigger should feel as “it’s working correctly” now if you pull it.
Now that the trigger is fixed, put the trigger bar into the right position. You’ll need to move the sear to the side, and fit the end of the bar up through the block, so that it interacts with the sear when the trigger is pulled. Next insert the trigger bar spring. The position of the spring can be seen in step 6 as well. The spring fits exactly into the cutouts on the block, so it should be easy to see how it should sit. It has a long end, and a short end. The short end goes into the groove on the trigger bar.
The slide stop is simple, but will not stay fixed until you insert the block into the frame.
The spring should just be dropped into the hole. There is nothing to fix either part into place.
The Ejector fits in the cutout of the block. Remember to insert the sear holder pin, in case it has fallen out, or you waited with it in step 2.
Insert the entire block into the frame. Make sure that the slide stop lever, and the ejector are positioned correctly. Then punch back in the frame pins.
In case you are reading this backwards, it may be a nice hint to know that the front pin only needs to go a little more than halfway through the frame until you can lift the block. The rear pin needs to go almost through. There is only about 1mm of frame here.