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7/21/2026 8:58:46 PM EDT
[Last Edit: Lexington][Edited]
I have seen discussions (long ago) about the provenance of bolt carriers marked 'J'. People have (stated? guessed?) that they are from J.C. Machine in Phoenix.

What I can tell you is that years ago, 2003-2004, I acquired a small box full of 'J' carriers with this label affixed, below.

I gave most to a friend who was building rifles but I kept two or three. I am reminded of these because I just opened my stash o' stuff and pulled one out to assemble a new BCG.

The more you know ... for posterity.





The Second Amendment: Preserving our right to petition the government - with malice.
"I guess it comes down to a simple choice, really. Get busy livin' or get busy dyin'."
Virginia Is For Loners (™)
7/21/2026 9:04:27 PM EDT
[#1]
7/22/2026 4:46:06 AM EDT
[#2]
I have a "JD" marked one from years ago that came with a Centurion RECCE build. It was an earlier one from Monty back before Centurion was cool. Would this be from the same people?
7/26/2026 10:53:01 PM EDT
[#3]
I have one that came in an old Sendra rifle
8/3/2026 2:36:57 PM EDT
[#4]
I had one years ago and remember reading they were from a company in Minneapolis. I used mine for a super-autistic "could be" clone of a 604 that was upgraded to an M16A2 with a CAPCO upper and the carrier replaced with one of these.
No one could take His life, He laid it down for me,
That twisted wreath of thorns, yea He took that crown for me,
But after three days, out of the ground for me,
He overcame it all, now I live to serve Him

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