ERGO

ERGO AR 15/M16 BOLT CARRIER GROUP

$214.99
SKU: 4958
EG4958_1
No-hassle 14-day returns

Description

Ergo Grip AR-15/M16 Bolt Carrier Group, Black Nitride Finish, Mil-Spec 4958
 
  • True Mil-Spec Bolt Carrier Group
  • Material: Case Hardened 8620 Steel
  • Finish: Black Nitride
  • Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked
  • Cam Pin: Hardened 4340 cam pin
  • Firing Pin: Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chromed
  • Bolt Assembly: The Bolt is Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit
  • Bolt Material: Case Hardened 9310 Steel.
  • Finish: All Bolt components Shot Peened and Black Nitride (except extractor)
  • Extractor: 4340 Steel , Manganese Phosphate coated
  • Mil Spec Extractor Spring and O-Ring Combination
  • MPI: Magnetic Particle Inspected
  • 100% Made and Assembled in the USA
  • Bolt: 9310 material, shot peened, MPI tested and hard engraved

Specifications

SKU
4958