Help with toolmark ID's?

[30 cal slut]

Is there a thread/database out their with toolmark ID's?

I recently came across an upper. It had a broken capital "A" by the carry handle and the letters "RI" in a circle on the FSB. Bolt carrier is unmarked as far as I can tell.

I'm stumped on the ID ... help?

[lamarbrog]

The "broken A" is the symbol for Anchor-Harvey Forge. A "square" is Brass Aluminum Forging Enterprises. A combined "AF" is Alcoa Forge, if I remember correctly. A "bird head" is Cardinal Forge. A "key hole" is Cerro forge.

Never seen any info regarding the FSB markings.

[Failure2Stop]

https://www.m4carbine.net/showthread.php?t=5357

[markm]

It's mostly meaningless info. Forge markings don't assure you that final machining is right... or that mil spec parts were used, etc.

[30 cal slut]

https://www.m4carbine.net/showthread.php?t=5357

Thank you. (I did a search for "tool markings" and came up empty).