i have 2 barrels i got during the ban. they are heavy barrels 16-1/2" and 20-1/2" . they are not threaded for a flash hider and i cannot find any markings on them except on the site base.
no bayonet lug.
it looks like  B99 RI (in a circle) 1
they are on A2 receivers.
any help for brand ?

thanks
ron

Pictures would help.
Taper pins or roll pins holding the FSB on? Where did you buy them? Any machine marks on the barrel? Color light grey, dull black, painted or parkerized?

The markings on the FSB are just forge markings. They do not in any way give you can indication on barrel make. They come from separate sources anyway.

sorry. i don't know how to add a picture.

no machhine marks on the barrels.

the barrels are a dull black.

tapered pins.

they came on "national ordnance co."  rifles.  houston texas

the receivers were done in a black powder coating.

i bought 10 of them  starting with #100 to #1000,

i also bought 10 of the stripped receivers.

i only have a few of them left now.

thanks for any help.

ron