The right upper?

[Dead Center Miss]

Makes it much easier to get to it to adjust it when needed.

And unless you drop it 30 feet from a tree ( I know from experence) your not going to have problems with it not being under the handguard.

That and I like the way it looks and it simplifies the build and can save money on the build by not having to find a super small adjustable gas block that fits under the handguard and the increased cost of that gas block.

I can see where it would be handy with an adjustable gas block. I missed that part in your first post.