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Greystone Defense Finishing has established its many processes to meet the standards required by the firearms industry. Our certifications are maintained through our quality systems that in each plant meet the requirements of ISO/IATF 16949. We use both our extensive in-house testing laboratories and, where needed, accredited 3rd party laboratories to perform chemical analysis and sample testing for process control and lot acceptance in order to meet, and often exceed, industry specification requirements. See the list below for all the specifications our processes currently meet. Feel free to reach out to us if you have the need for other specifications as we are constantly adding processes to support our customers’ needs.


  • MIL-A-8625 Type II & III
  • MIL-STD-171 Finish 7.2 and 7.5

Chrome Plating

  • AMS 2406
  • AMS 2460
  • AMS-QQ-C-320
  • MIL-STD-171 Finish 1.2.2

Black Manganese Phosphate

  • MIL-DTL-16232 Type M
  • MIL-PFR-3150
  • MIL-STD-171 Finish, &

Dry Film Lubricants

  • MIL-STD-171 – Finish 30.7
  • MIL-PRF-46010