With a number of the one of a kind projectiles I had handy — most notably the massive, 55 grain subsonic rounds from Detroit Ammo Co (not pictured) — the bullet-formed grooves inside the entrance from the FN journal didn’t Perform nicely. Absent with the bolt carrier team (BCG) https://cmmgmk5709852.blogdeazar.com/30928221/a-simple-key-for-cmmg-mk57-unveiled