This bolt carrier group offer smooth, reliable cycling as well as excellent quality and unsurpassed value.  These carriers are fully assembled, ready to go.  Drop-in, check headspace, and you are ready to shoot. 

Features:

• New AR15 Bolt Carrier Group
• Fully Assembled Bolt & Carrier Assembly
• Caliber:  .223/5.56 & 300AAC
• Carrier Material:  8620 Nitride Treated
• Bolt Material:  9310 Nitride Treated
• MPI (Magnetic Particle Inspected) Bolt
• Phosphate Extractor
• Properly Staked Carrier Key
• M16 (Full) Carrier has Forward Assist Serrations
• Firing pin
• Retaining pin 
• Cam pin
• All Parts Made in the USA