These followers have been tested to fits 10, 20, and 30 round Magpul PMag magazines, as well as each generation of the magazines. These followers will comfortably fit the 450 bushmaster, .50 Beowulf, and 458 socom in a single stack configuration. Magpul PMAG magazine requires modification. You will need to remove the center rib if you are using ammunition that has a ballistic top on it. If the round does not have a tip and has a flat nose then you may not need to modify the magazine.
These 3D printed followers may need light sanding and could be rough from the printing process, the roughness will not hinder functionality.
Each Follower has been test fitted in this style of magazine to ensure proper functionality.