Brownells AR-15 6.5 Grendel Bolt Features The Brownells AR-15 6.5 Grendel Bolt is constructed entirely from 9310 steel a material chosen for its ability to hold up under the higher pressures and rugged duty demands of the 6.5 Grendel cartridge. Every bolt is checked using magnetic-particle inspection a process that verifies material quality and helps catch flaws before the part ever reaches a rifle. This bolt is built to work reliably in both semi-auto AR-15s and full-auto M16 configurations giving it a wide range of application. The nitride finish adds corrosion resistance and a slick surface that aids smooth cycling inside the bolt carrier. This bolt assembly ships complete with gas rings extractor and ejector already installed saving the builder time and reducing the chance of assembly error. The Type II extractor includes its own spring and rubber insert both important to reliable case extraction under the Grendel s increased bolt thrust. Chambered for 6.5 Grendel this bolt is a direct fit for AR-15 platform rifles built around that cartridge. The Brownells AR-15 6.5 Grendel Bolt gives builders and owners a ready-to-install duty-grade replacement bolt for reliable performance. Brownells AR-15 6.5 Grendel Bolt Specifications Manufacturer: Brownells Model: AR-15 6.5 Grendel Bolt Caliber: 6.5 Grendel Material: 9310 Steel Finish: Nitride Color: Black Compatible Hosts: AR-15 Quantity: 1 Available At: GrabAGun