This mod features a couple of new craftable mods including a stock which converts a 10mm pistol into a rifle with new meshes and stats added to them.
So far, weapons that have new mods are Combat shotgun, Combat rifle, 10 mm pistol, .44 revolver and the submachine gun.
This mod is still a work in progress so expect updates regurarily.
To enable modding you need to add the following lines to FO4 ini files:
Fallout4Prefs.ini [Launcher] bEnableFileSelection=1 Fallout4Custom.ini [Archive] bInvalidateOlderFiles=1 sResourceDataDirsFinal=
After that, copy all of the folder/files to their respected directories