A SIMPLE KEY FOR CMMG MK57 UNVEILED

With a lot of the exclusive projectiles I'd useful — most notably the massive, 55 grain subsonic rounds from Detroit Ammo Co (not pictured) — the bullet-formed grooves inside the entrance of your FN magazine didn’t Participate in nicely.The projectiles would adhere or drag in there as well as the follower would bind. Given that the ProMags do