Aero Precision AR15 5.56 PRO SERIES BCG NTRD.

Aero Precision PRO Series Bolt Carrier Group, 5.56, Aero Logo, Black Nitride Finish APRH101767C.

The Aero Precision PRO 5.56 Bolt Carrier Group is built from the ground up to meet the demands of the most extreme conditions. Each component and manufacturing process of the PRO 5.56 Bolt Carrier Group was deliberately chosen to increase the reliable service life of the bolt carrier group and its components.