The Aero Precision Nickel Boron Bolt Carrier Group is a substantial upgrade from a standard BGC. Its NiB coating reduces friction on sliding surfaces and prevents carbon build-up making cleaning a much easier task. MIL-SPEC dimensions ensure correct component function and reliability.
No Aero 'A' Logo
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