If you like it "as is"., then keep it and shoot it.
I have torn down and rebuilt a few of my early builds.
They were original barrels and some are more desirable models or years.
Only 2 were on flats and a couple others were on NDS receivers.
I wanted better markings and better authenticity.
Othrtwise they were built fine.
I built a couple of parts/franken guns with the receivers I pulled off.