Dovetail to picatinny adapter/rail

The insert style works well enough for me, and doesn't raise a mount or 20moa rail enough to notice much. Ive bough some chineseium brands off Amazon as well as utg and they are all basically identical. One makes different lengths is really nice to have. Not to be mix and matched, all are not the same, the utg’s are also slightly different batch to batch. Best to keep as a set. 
 
This is the JP adapter, top and bottom, and on a rifle. 



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The Weihrauch, HW100 comes with one, I'm not sure if you could find one that an owner did not use, but it is about an 8" rail that slides over the 11mm and then set screws lock it into place, very minimal rise as well.

I've had 3 HW100 rifles, and none came with this accessory.

It's a new accessory, that they are now including in the box along with a drop stem for the side lever, I will dig one out and post a picture. I only noticed them this year in the boxes.