View Full Version : MR4 Magazine mod

08-12-2011, 10:01 AM
I just bought an MR4 and I really like it as far as a straight out of the box milsim marker. The only part I don't like is the magazine. I run compressed air so I'm not concerned about any expasion chamber upgrades, but does anyone know of any magazine upgrades or mods that can change this component of the marker?