Faxon Firearms Bolt Carrier Group Features The Faxon Firearms Bolt Carrier Group is built around a 9310 tool steel bolt that is stronger than standard C158 material and fully heat treated to MIL-SPEC which means the bolt holds up to repeated high pressure cycles without premature wear. Shot peening at the back of the lugs relieves stress concentrations and the 45 degree chamfer at the rear of the lugs keeps the action cycling reliably even under hot hand loads or lightweight recoil systems. The carrier itself is machined from MIL-SPEC 8620 steel and receives Faxon s Superfinish process which reduces friction and fouling so the action runs smoother and cleans up faster after a hard day at the range. A 4140 steel gas key fully staked with grade 8 fasteners keeps the gas system sealed and reliable for the life of the rifle. Every part of this Bolt Carrier Group is finished in a QPQ salt bath nitride coating that outperforms typical chrome and phosphate finishes in surface hardness and corrosion resistance which matters for a rifle that sees hard use in the field or at competition. The S7 tool steel extractor is fully heat treated and paired with nested .308 spec springs and an O-ring for dependable extraction while the 4140 pre-hardened cam pin receives the same nitride treatment for long-term durability. Compatible with the DPMS Gen 1 pattern AR-10 this BCG drops into large frame builds chambered in .308 Win 6.5 Creedmoor or 8.6 Blackout without modification. Shooters upgrading a large-frame AR for hunting competition or duty use will find this BCG a durable dependable core component. Faxon Firearms Bolt Carrier Group Gen 2 Specifications Brand: Faxon Firearms Model: Bolt Carrier Group Gen 2 Type: Bolt Carrier Group Caliber: 308 Winchester 6.5 Creedmoor 8.6 Blackout Material: 9310 Tool Steel Bolt 8620 Steel Carrier Finish: Salt Bath Nitride Carrier Type: M16 Compatible Hosts: DPMS Gen 1 Pattern AR-10 Weight: 1.12 lbs Available At: GrabAGun