Long shot here, been snooping around online for a while. Looking for a UBR Gen 1.0 to use on a AR15 CMP service rifle. They are a little heavier and more robust than the updated/lightened Gen2s.

Anybody got one they would part with?

I'd be happy to purchase & trade a new Gen2

Put this in the Classifieds; it's not gunsmithing.
I am not a moderator. Just that you will get more visibility there.