.308 / 7.62 Bolt Carrier Group, Complete – Black Nitride

Product Info for Aero Precision .308 Winchester Bolt Carrier Group

The .308 / 7.62 Bolt Carrier Group is the perfect firing mechanism for your big-bore rifle build. This high-quality 308 BCG features a Black Nitride finish, is MPI/HPT and now includes a laser engraved Aero Precision ‘A’ logo!

Carrier Features:

• Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt)
• Finish: Black Nitride – advanced lower friction coating that minimizes the need for lubricants and cleaning
• Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked
• Firing Pin: Machined from 8740 steel and hard chrome coated
• Forward Assist serrations
• Laser-engraved Aero Precision logo
• Carrier fits AR .308 compatible style AR Uppers and Rifles

Bolt Features:

• Material: Case Hardened 9310 Steel
• Finish: All bolt components are shot peened and black nitride coated
• Extractor: Machined from 4340 Steel with double o-rings and double springs
• Magnetic Particle Inspected and High Pressure Tested
• High pressure bolt – external surfaces are CNC ground after heat treat for a precision fit, and firing pin hole diameter is reduced to .070″
• Multi-caliber bolt designed to function with .308, 7.62×51, .338 Federal, and other .308 based cartridges.

308 BCG Includes:

• Bolt carrier
• Complete bolt
• Firing pin
• Cam pin
• Retaining pin