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AB Arms AB Pro Bolt Assembly is built to Mil-Spec dimensions. The Nickel Boron coated bolt needs virtually no lube during use. The Manganese Phosphate coated extractor has a surface finish that provides superior extraction during firing. These bolt assemblies are ready to drop into your bolt carrier group. These Bolts are specially made on high end Swiss machinery to have exacting tolerances and surface finish.
  • Bolt - Carpenter 158 Steel, heat treated per Mil-Spec requirements
  • Extractor - aircraft quality E4140 Steel, heat treated and shot peened per Mil-Spec requirements, Manganese Phosphate coated per Mil-Spec requirements
  • The AB Pro Bolt Assembly made on high end, Swiss CNC machinery to have exacting tolerances and surface finish
  • Bolt - Carpenter 158 Steel, MPI tested material
  • Bolt - Carpenter 158 Steel, Nickel Boron coated
ColorAs Shown
Dimensions6.00 x 3.00 x 1.00 Inches

AB Arms Pro BCG Nickel Boron Bolt with Phosphate Extractor ABA5.56B

AB Arms

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