V Seven M16 BCG Complete Manganese Phospate Finish. V Seven crafted these Bolt Carrier Groups with a 9310 alloy bolt and 8620 alloy carrier for enhanced durability at a lighter weight than heavier metals. Both components of this V Seven Rifle BCG Complete are 100percent MPI tested to ensure they'll perform in the field. Install this V Seven Complete Bolt Carrier Group BCG to create a powerful and reliable weapon for any application. Specifications for V Seven BCG Complete: Manufacturer: V Seven Condition: New Features of V Seven BCG Complete: Compatible w/ both semi/full auto configurations Black O-ring installed 100percent MPI tested Package Contents: V Seven BCG Complete Mil-Spec cam pin Chrome finished firing pin Firing pin Retaining pin What firearm models does the manufacturer say V Seven BCG Complete is compatible with? The manufacturer says that V Seven BCG Complete is compatible with M16 AR-15 AR-10 SR-25V Seven BCG-458: BCG Complete Black Melonite Finish