Failzero Bolt Carrier GroupAR10 (.308) BCG- No HammerA completely assembled, ready to install .308 BCG with no hammerFully assembled ready to drop into most mil spec AR10 upper receiversAll critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases both wear and corrosion resistancePatented Nickel Boron coating will reduce friction and improve overall performance of rifleDPMS pattern and 6.5 Creedmoor compatible Nickel Boron treated parts include:Bolt & Extractor (.308 compatible)Bolt CarrierExtractorCam PinCarrier KeyFiring Pin