BUIS Optical Illusions
This video from Kit Badger delves into the phenomenon of "optical illusions" affecting firearm zero when using Back Up Iron Sights (BUIS) through an optic compared to with the optic removed. The creator explains the science behind this issue, which can be significant depending on the rifle's intended use. The content focuses on AR-15/M-4 style rifles, discussing when and why BUIS might be utilized and how to properly zero them in this context.










