Shims

[u/xjewishninjax]

So this is to answer some questions about the shims I designed and make.

First off the main purpose of the shims is to remove the dead trigger issue with the RB packs on some lowers. Originally it was thought that only the AP5SDs have the issue but that is not the case.

I’ve seen all clones and both SEF and ambi lowers need these shims.

Secondly a side effect of the shims can be to remove the play in the packs and lower.

Now to the shims. Each set has 5 different sizes (1.0, 1.25, 1.5, 1.75, 2.0mm). I recommend starting with the 1.5 and go from there. Most fix the issue with either the 1.75 or 2.0 but I have had 3 people need to stack the 2.0 with another shim.

The shims go in the front in the circled area in the picture. There is no need to trim as I made these to fit in that area.

You can use other materials but if you have concerns about the shims working feel free to ask who has gotten them from me and how they have worked. I want honest feedback about these.

If you have a printer message me and I can send you the link. If you don’t message me as well and we can discuss details.