KAK Industry K-SPEC Enhanced Bolt Features The KAK Industry K-SPEC Enhanced Bolt is machined from 9310 steel a material chosen for its strength and resistance to fatigue under the repeated stress of cycling in an AR-15 direct impingement system. Its machine gun chrome finish adds a hard low friction surface that resists wear and corrosion while helping the bolt cycle smoothly shot after shot. The dual ejector system at the heart of this bolt uses mil-spec ejectors and springs that require no proprietary parts making maintenance and replacement straightforward for armorers and home builders alike. Ejector holes are centered directly on the locking lugs a design choice that avoids weakening the bolt s structural integrity while still enabling dual ejection. This dual ejector configuration increases ejection reliability and adds consistency to the ejection pattern addressing a common pain point in standard single ejector AR-15 bolts. KAK Industry brings over a decade of experience manufacturing dual ejector bolts for the AR10/LR308 platform to this AR-15 application applying that proven design knowledge to create a durable reliable component. The bolt remains fully backward compatible with standard mil-spec bolt carrier group parts so it drops into existing builds without requiring special tools or modifications. For AR-15 owners seeking a stronger more consistent ejection system the KAK Industry K-SPEC Enhanced Bolt is a worthwhile upgrade. KAK Industry K-SPEC Enhanced Bolt Specifications Manufacturer: KAK Industry Model: K-SPEC Enhanced Bolt Compatible Hosts: AR-15 Caliber: .300 AAC Blackout Material: 9310 Steel Finish: Chrome Color: Silver Handedness: Right Hand Weight: 1.44 oz Available At: GrabAGun