CONSIDERATIONS TO KNOW ABOUT CMMG MK57

With some of the distinctive projectiles I'd handy — most notably the massive, 55 grain subsonic rounds from Detroit Ammo Co (not pictured) — the bullet-formed grooves while in the entrance on the FN journal didn’t Perform nicely.The projectiles would adhere or drag in there along with the follower would bind. Because the ProMags have no inwa