Similar to HRD 6mm spacer kit, this design offers STL and source file which limits the internal space for an Accuarcy International AW magazine (0726) to be able to reliably feed 6mm BR (and derived) carriage.
Find the source from the github https://github.com/eamars/aw_magazine_6br_spacer_kit
Parts are oriented to the print position. You will need to enable support in order to print the follower.
The 3d printed follower allows full bolt engagement subject to the magazine feed lip. It should work with most 3 lug actions. Additional fitment and adjustment is required for common 2 lug remington clone actions.
The author marked this model as their own original creation.