BPM Tech BulletinsJolene Burns2022-08-04T14:11:23+00:00 https://usamade-ar15parts.com/BPM Technical Document on Ring Tension vs Cross Section.pdf https://usamade-ar15parts.com/BPM Technical Document on Port Erosion BPM Letterhead.pdf https://usamade-ar15parts.com/BPM Technical Document on Maintenance and Life Expectancy of SBR or Pistol type DIG AR platforms.pdf https://usamade-ar15parts.com/BPM Technical Document on Heavy Buffer Application relative to Suppressor usage and Port Erosion.pdf
