AR-15 Bolt Carrier Group, Black Nitride Finish

Infinity Ammo KARMA Munitions

$ 159.00 $ 119.00


AR-15 Complete Bolt Carrier Group, Black Nitride Finish

Sale Price: $119.00 (Regularly $159)

Complete Bolt Carrier Group fits all AR15/M4 compatible style rifles chambered in:

  • .223 Remington
  • 5.56 x 45mm NATO
  • .300 AAC Blackout

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SPECIFICATIONS:

Bolt Carrier Group

  • Case Hardened 8620 steel
  • Black Nitride finish for improved cycling reliability
    (This advanced low friction coating minimizes the need for lubricants.)

Gas Key

  • 4130 Steel attached with Grade 8 hardware
  • Staked to military specifications to ensure proper positioning.
  • Hardened 4340 Steel Cam Pin

Firing Pin

  • Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated

Bolt Assembly

  • Case Hardened 9310 Steel.
  • CNC machined after heat treat for an exacting fit.
  • Black Nitride finish

Extractor

  • 4340 Steel Mil Spec Extractor Spring & O-Ring Combination

 

Our BCG assemblies are fully inspected and tested using both Magnetic Particle Inspection (MPI) and High Pressure Testing (HPT) methods to ensure safe and reliable operation for the life of your firearm.

 

Caliber: .223, 5.56, .300 Blackout

 

Made in the USA!


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