MPN: APRH308184C / APRH308186C


  • High pressure tested (HPT), magnetic particle inspected (MPI), and shot-peened
  • Properly staked gas key with Grade 8 hardware
  • Available in Mil-Spec Phosphate coating and Black Nitride finish - advanced lower friction coating that minimizes the need for lubricants and cleaning
  • Multi-caliber bolt designed to function with .308, 7.62x51, 6.5 Creedmoor, .338 Federal and other .308 BCG based cartridges
  • High-pressure bolt-external surfaces are CNC ground after heat treatment for a precision fit, and the firing pin hole diameter is reduced to .070"
  • Extractor with double O-rings and springs


  • Caliber: .308 Win / 7.62 NATO / 6.5 Creedmoor / .338 Federal
  • Weight: 18.56 oz.
  • Finish: Mil-Spec Phosphate or Black Nitride
  • Material:
    • Bolt Carrier: 8620 Steel
    • Bolt: 9310 Steel
    • Extractor: 4340 Steel
    • Gas Key: 4130 Steel
    • Firing Pin: 8740 Steel
  • Profile: Full-Auto

**A full-auto (A.K.A. M16) bolt carrier installed in a standard semi-auto AR-15 will not make the gun fire full-auto.


  • DPMS Gen I pattern LR308 rifles

*Will not fit DPMS Gen 2 pattern rifles


  • 1x Bolt Assembly
  • 1x Extractor
  • 1x Cam Pin
  • 1x Bolt Carrier
  • 1x Carrier Gas Key
  • 1x Firing Pin
  • 1x Firing Pin Retaining Pin


When you want a quality AR-10 bolt carrier group, you don’t want to be the guinea pig in someone else’s experiment. That’s why choosing an AR-10 BCG from a name you can trust is important. Aero Precision has built an excellent reputation in the small arms community by offering quality parts the consumer can count on, and it is an excellent choice for your next AR-10 build. Whether you prefer a Mil-spec black phosphate finish or the advanced self-lubricity of a black nitride finish, you’ll get exactly what you want when you order a .308 BCG made by Aero Precision.


Aero Precision’s AR-10 bolt carrier group starts with 8620 billet steel, and it’s machined and case-hardened to make a durable carrier body that will serve without fail, even under the stress of automatic fire. Forward assist serrations let you keep the security and flexibility of the .308 BCG with a forward assist in your build, giving you options when you need a little nudge or a less noisy beginning to an engagement cycle. A 4130 gas key is attached with secure grade 8 hardware and staked for worry-free security.

The firing pin in this AR-10 BCG assembly is hard chrome-coated 8740 steel and operates in a case-hardened 9310 steel bolt body. The high-pressure, heat-treated bolt surfaces have been precision ground for a smooth fit and easy operation. Aero’s exacting specs feature a .070-inch firing pinhole diameter. Precision fit and quality treatment reduce the risk of failure of your Aero Precision .308 bolt carrier group, so you don’t have to worry about tearing down and swapping out parts as often as the other guy.

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