FAILZERO EXO AR15 simi-auto BCG/FREE SHIP

A completely assembled, ready to install AR-15 Bolt and Carrier System that is treated with EXO Technology, a revolutionary surface technology that provides permanent dry lubricity, radically improves the performance of your AR-15 and eliminates the need to apply oil or grease to treated parts for the life of the weapon. These BCGs have fired over 20K rounds in a standard anodized upper. Quality features include: •Case Hardened, Shot Peened, MPI (Magnetic Particle Inspected) and HPT (High Pressure Tested) •Mil-Spec Gas Rings •EXO Coated Semi-Auto Carrier •Gas Key with EXO Coated exterior •Gas Key Hardened to USGI Specifications •Grade 8 Hardened Fasteners •Black Extractor Insert •Mil-Spec Staked Gas Key •Firing Pin and retainer