The Aero Precision AR15 5.56 PRO Series Bolt Carrier Group represents the pinnacle of AR15 BCG design. This enhanced BCG features a 9310 steel bolt that undergoes a proprietary heat treatment process for superior strength. The carrier's internal surfaces are precision ground for optimal gas efficiency and smoother operation. The nitride finish provides excellent wear resistance and reduced friction.

Features/Specs:

• Caliber: 5.56 NATO / .223 Remington
• Bolt Material: 9310 steel with proprietary heat treatment
• Carrier Material: 8620 steel
• Finish: Black nitride
• M16 cut carrier profile
• Precision ground internal surfaces
• Cam pin with indexing mark for consistent installation
• MPI (Magnetic Particle Inspected) and HPT (High Pressure Tested)
• Properly staked gas key with grade 8 fasteners
• Weight: Approximately 11.4 oz
• Compatible with AR15 platforms
• Made in the USA