Thanks for all the input and you all are correct about if i am going to suppress then do the 300. So does anyone have a 300 BO barrel you want to sell for cheap.
Depends on how quiet you wanna go. With a 5.56 SBR, a good suppressor, and standard ammo, you can easily run the gun without ear muffs. Nope, not as quiet as a suppressed .300Blk running subsonics, but possibly quiet enough depending upon your needs.