Rear sight angle vs front sight post hight.

Most of my shooting is 10/12 meter target shooting.
Some time ago I noticed that, to get my sights properly adjusted, I had to turn the rear sight all the way down. By doing so the rear sight slightly leans backward (see picture 1 for reference)
The bottom of the notch in the rear sight is now not defined by the underside of the rear notch but by the top of the sight which give it a slightly blured picture as you look at rear sight at a slight angle (see picture 2)

As my eye sight is not as good as when I was 18, I need a as sharp sight picture as possible and have sufficient light between the front post and the rear sight notch.

The limited rear sight kept annoying me so I ordered 2 new front sight posts with 1 mm extra  height.
By using a 1 mm higher front post I have to raise the rear sight to get back on target and get back the complete notch depth and don't look at the top of the sight (the red area) any more.

Picture 1:Rear sight is slightly lower in rear

Picture 2:Red area is  what I see as bottom of rear sight notch

I ordered part no. Walther 2743774 and 2743778. Both are front sights with 1 mm added height.
After receiving them I compared them to my original front post and I found out that I Already have a 1 mm extra height front sight. Back to square one.
This was my fault, I did not know I had a 1 mm extra height front post.

Picture 3: 3 front posts, same height

I tried to ordered  Walther front post part no.: 2743776 (this post has 2 mm extra height) from a gun shop in Germany (from which I ordered the other 2) but they told me Walther doesn't have them anymore.  I contacted Krale schietsport in the Netherlands and to my surprise they had it in stock and I'm now waiting to get it in the post.In the mean time I cut off the head of a small carpenters nail and used it  as a shim under the front post, giving me the desired extra 1 mm. The small allen lock nut that holds the front post in the barrel holder does not fully engage the slot in the post (see picture 3) but is tight enough for the moment.

Arrow shows post now portruding 1 mm from barrel holder

I took it to the range this afternoon and sighted it in. As you can see the rear sight sits a lot higher now and is no loger leaning to the rear. I get a better sight picture.
(compare picture 1 with this one)


The SP20 RRS is a 25 meter rapid fire pistol. With my 10 meter sight setting the round come off 2 inches low at 25 meter, so the problem with my sights is not in the gun but in the fact that I shoot it mainly at 10 meters.