The Sako 100 B1 Magazine is a premium factory-original replacement accessory engineered explicitly for Sako's multi-caliber switch-barrel rifle platform. Precision manufactured from high-grade steel, this robust, all-metal staggered double-row magazine ensures flawless mechanical feeding and exceptional longevity under demanding field conditions. This B1-specific configuration keeps uniform external chassis dimensions to fit the standard single-action receiver frame while utilizing customized internal geometry optimized for heavy belted-magnum cartridges. The design integrates total latch control to prevent accidental drops while perfectly supporting top-load capability so shooters can feed cartridges directly through the ejection port. Holding a reliable 4-round capacity, investing in this authentic Sako Factory Component ensures exact engineering tolerances and smooth bolt cycling during critical backcountry hunting pursuits. Sako 100 B1 4rd Magazine 300Win, 7mm Rem-Mag, 375H& H S5S100211329