FASCINATION ABOUT CMMG MK57

With many of the special projectiles I'd helpful — most notably the big, 55 grain subsonic rounds from Detroit Ammo Co (not pictured) — the bullet-formed grooves inside the entrance in the FN journal didn’t Perform properly.Both of those ProMags I utilized worked flawlessly, as well as the manufacturing facility 5-seveN mag I'd did not. I’l