This is in no way meant to be a tutorial, there is already an excellent one on the m1919a4 forum.
This is more like a journal of my first attempt at one of these builds.
I've gathered all the necessary parts and equipment so here goes.
For those unfamiliar with a m1919 build, the RSP (right side plate) is the receiver according to the alphabet boys.
I bought a 80% RSP from brasscartridge on the 1919 forum. excellent piece of work, I highly recommend.
Turning a 80% RSP into a finished "receiver" is mostly drilling, counter sinking, filing/fitting etc.
The only required tools I did not already own were a 9/16" cobalt bit and a special 60 degree counter sink (available from Brownell's).
This was todays assignment
Here's pics at both 80% and finished.