Griffin Armament EBCG Enhanced BCG 556 / 300BLK

Griffin Armament EBCG Enhanced BCG 556 / 300BLK. The simple answer is that these BCG's are the best they've used in their ten years of military service and over a decade of industry involvement. When you look at a top shelf product you can see its quality. These are the best mil spec pattern there are. The Griffin BCG combines an 8620 carrier C-158 (Carpenter) Bolt 4340 cam pin and extractor. All the proper heat treats the correct shot peen and the often neglected post heat treated grind are present. In a market filled with cast component BCG's all components are billet machined and all surfaces receive a finish pass in machining for improved surface smoothness. There are varying degrees of quality in Melonite QPQ finishes. These BCG's went to 4 finishing houses for selection of the finish provider cost not being a consideration. The result is a deep black finish with remarkable lubricity. These are assembled to the current military technical data package with permatex'd and properly staked carrier keys. They also feature the current 15000 round extractor spring design and a Crane O ring for reliable extraction in extreme conditions. At Griffin Armament they ran these thousands of rounds in multiple manufacturers rifles throughout the T&E phase without a single malfunction. From first sight through months of use to the final product launch they have remained excited to bring this BCG to market. This is the only BCG that has ever excited them and that is why they have chosen to offer it to the people they care about thier customers. Specifications for Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG): Manufacturer: Griffin Armament Color: Black Finish: Melonite QPQ Fabric/Material: 8620 Alloy Steel 4340 Alloy Steel 9310 Steel Carrier Material: 8620 Steel Bolt Material: 9310 Steel Caliber: 5.56x45mm NATO .300 AAC Blackout Gun Make: AR Platform Gun Model: AR-15 M4 Weight: 5 oz Condition: New Included Accessories: Cam Pin and Extractor Crane O-Ring Gas Key Carpenter 158 Bolt Carrier Features of Griffin Armament Enhanced Mil Spec Bolt Carrier Group BCG C-158 Bolt MP inspected High Pressure Tested Bolt properly heat treated shot peened and post heat treat ground with headspace held to half the blueprint specification 4340 Cam Pin and Extractor Finish Pass Machined on all surfaces Full Billet Construction Premium Melonite QPQ Finish Latest 15k round Extractor Spring Design Crane O-ring for increased extraction reliabilty in extreme conditions Billet machined gas key installed with permatex and staked to current TDP Package Contents: Griffin Armament Enhanced Mil Spec Bolt Carrier Group BCG What firearm models does the manufacturer say Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG) is compatible with? The manufacturer says that Griffin Armament Enhanced Mil Spec Bolt Carrier Group (BCG) is compatible with AR-15 M4Griffin Armament GAEBCG: EBCG (Enhanced BCG 556 / 300BLK)