Drop-in Mil-Spec / GI magazine Follower which means that there is no disassembly of the magazine is required, It just snaps in/out of the top of the magazine in a few seconds using a 3/32" hex key. No need to buy dedicated magazines for the 450 Bushmaster. (You can also use the firing pin from your rifle as an installation tool in a pinch) It works well in most any of the good quality aluminum and most steel magazines.
This follower will nicely fit the following caliber of ammunition. .450 Bushmaster, .458 SOCOM, .50 Beowulf.
These have been tested on the following magazine brands D&H, ASC & Elander with no issues.
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.