How to Zero a U.S. Optics Foundation Series Scope | ER3K Explained
@TiborasaurusRex·Security·3k views·6 days ago
Step-by-step guide to zeroing U.S. Optics Foundation Series riflescopes, covering the ER3K elevation adjustment system and center screw calibration across four scope models.
rifle-opticsscope-zeroingprecision-riflemarksmanship-fundamentals
