AERO PRECISION AR15 5.56MM BOLT CARRIER GROUP, COMPLETE, NICKEL BORON

Aero Precision AR15 5.56mm Bolt Carrier Group, Complete, Nickel Boron; 840014611911; 2100000051144;

Our upgraded nickel boron bolt carrier group is an eye catching addition to your AR build. Mil-spec dimensions and coating ensure the highest quality and correct component interface.

FEATURES:

• Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt)
• Carrier has forward assist serrations
• Shrouded firing pin
• Nickel Boron Coating inside and out (Bolt, Carrier, and Gas Key)
• Forged Mil-Spec gas key attached with Grade 8 hardware and Properly staked.
• 5.56 Bolt is shot Peened and MPI
• Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring
• Tool Steel Extractor
• High quality BCG