I know a guy…
Let’s take a look at something-
When you say it shoots no better than 5 MOA what distance are we talking? Is it consistent grouping that is just loose or is it erratic in patterns?
Carbon or Stainless?
What twist rate & gas system length?
Chrome lined, melonited or plain?
How is your point of aim vs point of impact?
Irons or optic?
If optic what is it and what mount?
There are a lot of variables in play.