What HOLLEYMAN said,
and congrats for the great visual aids
EXCEPT,
the damn US GI pins are harder than the bearings in the hubs of hell.
These days, if I want a longer pin, I just chop down a piece of 5 MM round hard steel that I scrounged from the front axle of a mountain bike quick release. Top quality hardened steel, already the correct OD. You just have to cut it to length and drill the hole for the tiny retaining pin.
And that is lots of fun.
Start the hole with a very small Dremel abrasive bit, then do your drilling.
Good luck with that,
and,
"A plasma welded Titanium piece would be my choice if I was so worried about realizing cheap fixes actually work."
Charles Emond obviously MUST have years of experience as a government contractor or supplier of some sort, because that is obviously the choice any public trough funded Govt agency would make .... no popsicle sticks allowed in the proper official supply channels for sure.
Maybe the TROY, MK 1, C1 A1 version, designed for the Canuckistani market, and all their Oriental M14 clones, will have that modded in?
[;{)
LAZ 1