Armor Handguard Closed End Handguard Handguard-related products Replacement Bar-End Adapter For Armor Handguard Explore this brand's products Part number F5273 OEM Part number ZE71-7911 F5273 Product Overview Product Description Bar-end adapter for Armor handguard installation. The included anchors (2 types) are compatible with handlebars with an inner diameter of 13.519mm.