Luth-AR Complete AR-15 5.56/.223 Bolt Carrier Assembly

These complete Bolt Carrier Groups from Luth-AR are drop-in ready for your AR-15 rifle. The Luth-AR Complete AR-15 5.56/.223 Bolt Carrier Assembly includes 2 bolt carrier key screws, carrier key, firing pin, cam pin, and firing pin retaining pin. The Heat-treated bolt carrier made of 8620 steel is to Army Mil-Spec standards, the cam pin is 4340 alloy steel, and the carrier key is 4130 alloy steel. The bolt is manganese phosphate, and the extractor is 4140 chrome-moly. Luth-AR has been making innovative and top-quality AR parts since 2013, and their popularity and track record speak for themselves! Specifications for Luth-AR Complete AR-15 5.56/.223 Bolt Carrier Assembly: Manufacturer: Luth-AR Color: Steel Fabric/Material: 4140 Chrome Moly, 8620 Steel, 4340 Alloy Steel, 4130 Steel Cartridge: 5.56x45mm NATO, .223 Remington Gun Make: AR Platform Gun Model: AR-15 Included Accessories: Standard Condition: New Bolt Material: Steel Carrier Material: 8620 Steel Features of Luth-AR Complete AR-15 5.56/.223 Bolt Carrier Assembly Bolt: Due to supply chain issues, material for the bolt may vary. Mil-Spec heat treat Manganese Phosphate Bolt Carrier Specs: Carrier: 8620 steel Cam pin: 4340 Alloy steel Carrier key: 4130 Alloy steel Army Spec Heat Treatment Manganese Phosphate or Black Nitrate finish (based on available inventory) Auto or Semi-Auto cut (based on available inventory) Extractor: 4140 Chrome Moly Machined from bar-stock Mil-Spec heat treat Manganese Phosphate Package Contents: Luth-AR Complete AR-15 5.56/.223 Bolt Carrier Assembly Bolt Carrier Carrier Key Firing Pin Cam Pin Firing Pin Retaining Pin Bolt carrier key screws (2)