Where do you plan to hang the stock on your person when the pistol is riding in a holster?
The Luddite in me cannot help but think with stock attached to a Glock or most other plastikpistoles you now have a low powered rifle that can’t do better than 8-10 MOA at best. Once the stock is attached the limitations of the pistol end of the assembly become more apparent as service pistols of this type are not exactly tackdrivers.
Please excuse the commentary as I am sure that if you are having fun you no doubt are.