MA Defense gas keys are made for 8620 Steel and maintain TDP specs. All gas keys are gauged when we receive them and any keys larger than 0.181" are returned to the manufacturer, rest assured we pay very close attention to every detail. Keys are hand lapped to ensure the mating surface is true and flat.
We recommend using Vibra-TITE - 54110 541 High Strength Slip Fit Anaerobic Retaining Compound or Loctite 620 to ensure there is a good seal between carrier and key. OCKs are highly recommend when choosing a fastener, properly torqueing the gas key screws (50 to 58 inch/lbs), and staking the gas key in two places (each screw).
Like all of our parts, these are proudly made in the USA.