Daniel Defense 5.56 NATO (5.56x45mm & .223 Remington) complete bolt carrier group assembly.
Carrier Machined from 8620 steel Heavy Phosphate Coated Chrome lined Properly staked gas keys Made in the USA Bolt Machined from Carpenter 158 Steel High Pressure Tested Magnetic Particle Inspected Shot Peened Heavy Phosphate Coated Extractor Booster Made in the USA