I bought one of these and it was way more better than I expected for a bargain basement price.
https://www.elitegunroom.com/rifles/semi-automatic-rifles/dbf-db15-556-16-mlok-moe-30rd-blk810035755406
I have a pair of Taylor Shootin Irons. Fit and finish are very good and never had a hiccup.
Also have a pair of stainless Ruger Vaqueros . Fit and finish also very good. They had to go back to Ruger for some issues, which they fixed under their lifetime warranty.