The OP was like, last year, more or less...
It would only take a few minutes searching, if he really wanted what he claimed, and in real terms the only drawings that are liable to come dimensioned and toleranced, are actually open source Military drawings from the US of A (bless 'em for that!).
Pretty much every other drawing I have ever seen or found assumes that you are well enough versed in what you are doing, to have a handle on the tolerances appropriate for what you are doing, as well as the skills in heat treating.
Some are only useful if you happen to have the casting or forging they were based upon.
I have a couple sets of drawings that are for Win 1885 High and Low Wall rifles, that frankly, are nice start, but would look great on a wall. Same with drawings of a series of different sights, at least two different supposedly 'working' Gatling guns, and a fair few others.
They would look OK onna wall, but would cause no end of problems if trusted as a source for building the actual firearm itself.
It's worth keeping a skeptic's eye on things if you actually think the drawings are supposed to be useful for building what they are of!